Emergency Shutoff. 85fordyota, Jun 18, 2012. actually no high idle, blue sea has a charging relay, primary objective is charge the starter battery, then does the house/rv battery. Your alternator is kind of like 3 generator circuits in one. Alternator is less than two years old. Small Diameter Alternator Pulley. alternator. checked voltages at alternator connector (backprobed terminals with connectors connected) with truck off, koeo and koer at idle; results as follows: terminal c at alternator which is gry wiregoes to pcm and is the off/run/crank volts field duty cycle signal key off eng off 0v, koeo 2. Some Questions:. What headlight? Some H4 auto bulbs are higher wattage than the typical MC alternator can handle at low speed. The only time mine drops to yellow, is when the fan kicks on. ( this speed is a design choice when manufacturing the alternator. A Vanner HBA® eliminates hydraulic lines when powering electric cooling fans. This solved the problem, but only when the car was warm (ie after about 10min driving. 6 volts your amp-rate might only be 10 to 15 amps. I noticed that at idle when I rev the car above 2000RPM the light would go out so I took it out for a drive & didn't have any issues & the battery light eventually went our under 2000RPM at idle. And both standard and superbugs had the same alternators from 71 onwards so there is no specific superbug alternator. Your 39 amps at idle is way too much, assuming that the reading is correct. Other sprinter vanlifers recommend it. For some alternators, it's normal to see as low as 13 volts. 3) Turn on Headlights to High Beam. My problem is that the "alt" stays on when the key is off. While most people won’t be sitting with their car running while in neutral you should know that your car battery will still charge if your vehicle is in neutral. This problem started after throttle position sensor was replaced. Then meter the voltage while cranking and at idle once warm. Doesn't matter whether the car is on or not. 5V, but as long as the voltage is between those limits the alternator is pushing current into the batteries. This effectively bypasses the regulator and makes the charging system produce full unregulated output. Second generation YD (2014-2018) / Kia Forte TD 2014-2018 Service Manual / Engine Control / Fuel System / ISG (Idle Stop & Go) System / Alternator Description The charging system included a battery, an alternator with a built-in regulator, and the charging indicator light and wire. 8V or greater (high idle). Try at idle, 2k and 4k RPM. Depending on the year of your VW, the regulator can be found under the rear seat (left side) or be mounted right on top the generator. Charging Checks. ” Charging amps are the total amps minus the ignition’s requirements. 4 at idle and 12. sometimes it would drop to 13. The alternator was a direct OEM fitment with effortless installation. If you want more output at idle, you need a smaller diameter pulley so that the armature spins faster. Charging at 13. This diagram shows how to wire a Delco (GM) internally regulated 3-wire alternator. 8 depending on battery type it holds it at that voltage until the. If you had to crank on it because it was cold, maybe as low as 13. Technically speaking, 12. Install wiring harness clamp bracket with bolt contained in kit. When the idle increases to 1500, the voltage jumps up to 13. an upper alt bracket from a car or truck with HD charging will bolt right up- they have at he bigger 14SI alternator that puts out like 120 amps. alternator not charging without revving engine 4 Answers. At idle (700 RPM) it doesn’t make enough voltage to charge beyond a float level. The only wayI know to have 60 amps avialable at idle is to have a 100+ amp alternator. checked voltages at alternator connector (backprobed terminals with connectors connected) with truck off, koeo and koer at idle; results as follows: terminal c at alternator which is gry wiregoes to pcm and is the off/run/crank volts field duty cycle signal key off eng off 0v, koeo 2. Sometimes at the ends of the rotor small brushes can be found, which provide electrical charge to the electromagnetic shaft from the battery. Now repeat the charge amps test, but this time, DO NOT EXCEED 3000 RPM, the voltage could go dangerously high. Turning the engine off and restarting it solved the issue and charging volts went back to around ~14. 8 and goes down from there. Vanner HBA®s and EBA®s (Electric Buses) single configurations provide up to 300 amperes at idle and dual configurations provide up to 600 amperes at idle in a clean solid-state DC-DC converter. 5V at idle because I am only getting that at 3000rpm? My battery was dead the other day had the battery, sub tank and A/T oil temp lights on dash before it died. 2014 Camry sporadic rough idle and dies. You have some evidence of some bad stuff going on under the hood. That is, the alternator output required for this battery bank, in. So sent my car in to get its 100k service due to leaking cam seals so while it was in I got the alternator rebuilt as well but now doesn't charge at idle. I have 13-14 volts at high idle. Let the engine idle at around 1200 rpm. 6, when engine is turned on it goes down (as expected) for a short while but never gets above 12. 2 when reved to 3000 rpm then it gets to idle, it remains at 14. If you had to crank on it because it was cold, maybe as low as 13. The vehicle's charging system should also be checked to make sure it is operating correctly and is capable of keeping the battery at full charge. When a battery has just finished charging (or when you just shut off your car after driving for a bit), the battery will typically have a "surface charge" so its voltage will be in the upper 12s or possibly even low 13s, and it takes the battery a while (couple hours, perhaps) for its voltage to drop down to its true. In this case, the car's ignition system and accessories will drain the battery when the engine idles. Alternator is less than two years old. You won't get the nice idle flare-up to 1500 rpm at start-up, and it will tend to stall at stop signs. 8v whether the car was in idle with no load, idle with a lot of load (high beam and rear defroster) and fast idle with load and no load. What is the voltage with the engine running at idle and 1200 rpm, you should get about 14. then i replaced the alternator with a high output one (150 -160 Diagnosing a car that dies while driving or at idle Check the fuel pump if your vehicle stalls when stopping at a red light and then starts right back up. See if you get any real AC volts on the line (bad diodes). 2 difference on my Porsche ) but not all cars are the same, so not sure if the GTS alternator is designed to function differently. Before conducting the procedure, verify that the vehicle is included in the list of affected VINs. 8 at idle, but when at high rpm always when to 13. o0GuitarKid0o Proven Member. Revving the engine won't help: jumpstarting draws amps from the good battery, which is unaffected by. It's nice to do this test because there's no good "do it yourself" way to test the regulator with the alternator disassembled. 5 amps average (let's say 40). Sympton: Battery slowly goes dead, but ammeter sometimes shows a positive charge. You may not have a problem. If it is weak the base voltage would be lower. Alternator charging at 18 volts, replaced alt and didn't fix. The alternator must be in a proper, working condition. I’m assuming that we are discussing a normal gasoline or diesel vehicle that is not a hybrid, for the purposes of my reply. 75", and I had undercharging at idle. 0L with a single alternator appears to have a low voltage reading in the 11-12 range after startup. If any diode is shorted internally, the battery will be drained usually overnite. an Alternator Better Battery Life Another added benefit of oversizing the alternator is the positive impact it can have on your batteries. It also energizes the alternator which begins to produce its own current when the alternator nears the engine's idle speed. - Open Charge Lamp Some charging systems will not properly operate if the charge lamp bulb fails. Learn vocabulary, terms, and more with flashcards, games, and other study tools. If you are having problems with overall alternator output or charging at engine idle, maybe a smaller pulley is all you need. when idle it would. The curve structure also shows that the alternator is running at the fast idle speed setting. PimpingA1997Jimmy · Registered. Especially at idle speed. I would have figured that it would have been up higher because it is trying to charge the battery back up to spec. Mitevo7 As for idle speed, since mine is a converted. You need to change to a 12Si 94A alternator, don't get a cheapy knockoff no name brand, get an AC Delco unit so you know you have a proper alternator. The alternator delivers its maximum idle speed power near the 14 V design voltage. 00) it charges at idle 14V ! no gen light at idle, thats why I needed this one, the old one was barely charging and I had the red gen light on at idle,. alternator. SPECIFICATIONS Performance Output 12 Volts 240 Amps (160 Amps at idle) 12 Volts 275 Amps (180 Amps at idle). If this wire is shorted to ground, the alternator will not charge. The alternator produces a maximum of 270 amps and will produce a minimum of 170 amps continually at low idle speeds and maximum output above 1800 engine RPM. The charge indicator operates on the basis of opposing voltages. The 1 wires just don't do the job as well as a three wire. It's just an issue with the small stock alt I have the same car as you and noticed the same thing. 5 Volts DC or less. Now the alternator gauge reads at a much more acceptable level at idle even with accessories on. This one is charging at around 14. anyone have any ideas what is causing this? please help. When I had my '71, I went to the one wire alternator and did not like it. getting it back on ?the alternator was Full of 26 years dirt I have cleaned it. To test the alternator and regulator output, test the current flow from the alternator with an induction ammeter. Powermaster Alternator is designed to work as a 1 wire without any connections to the plug in. 5 volts or so as measured at the battery, the battery will never achieve a full charge, and the charging system is at fault. 2001 chevy express van 4. So when current stops charging the battery it shuts off. After the battery recovers, the output might go down to just over 13 volts, depending on if you have your lights on, radio playing, blower motor running, etc. With my pulley ratio I'm well below the alternator max rpm at my engines max on track rpm. 5 Volts in a 4 months old battery, at what RPMs would you be testing the alternator output? ie: Idle at 800 RPMs or a little more?. It's charging at 14. But, after accelerating engine to about 1800 / 2000 rpm it starts to charge normally and continuously. The charging voltage was consistently 13. When I start my boat for the first time for a few weeks my battery voltage when engine is running is just over 12. Most modern car alternators output about 100 amps at max rpm. The same as running a lot of audio equipment on a stock alternator. With the Mean Green, I show the amount of charging that the OEM did at 3,000 rpms. So don’t even think about letting it idle to recharge the battery. 7 volts the rest of the way. The voltage at the battery is more like 12. Also the charge lamp is basically wired between the alternator output and the battery so that when the alternator is charging both sides of the lamp are at the same nominal +12 volt level with another resistor to the battery common/ground. During the idle of the engine, the charging system don't really produce much current into the battery at all. This may give warm up time. At an idle with an adequately charged battery and no load the alternator shows no charging voltage increase. Mitevo7 As for idle speed, since mine is a converted. Also do not let it run long like this. Your voltage regulator should cutout at ~14. Now the alternator does not charge. if you are not recieving at least a 13 on your battery at idle then there is a problem with your connections from the alternator to the battery or alternator is gone. The two lead connector at alternator is alternator control. When you are at idle, the alternator is not producing a sufficient charge in order to maintain the amperage load of your rig. This will help you to identify all the different wires and thus will make the alternator troubleshooting quite easy and convenient. 6, when engine is turned on it goes down (as expected) for a short while but never gets above 12. If you are having problems with overall alternator output or charging at engine idle, maybe a smaller pulley is all you need. 2 volts at 2000 rpm. Tell us which alternator, one-wire or three wire, amperage rating would help also. I have checked the alternator, and it is charging the battery when cranked. I prefer the quietness of a TM and with the high output alternator charging the TM batteries back up, I'm not strapped to the capacity of the batteries to determine how long I can run the TM, or the length of my fishing. This system consists of a 270 Amp alternator. The alternator was a direct OEM fitment with effortless installation. The alternator that does not charge at idle, I would try to put a smaller pulley on it. Most modern car alternators output about 100 amps at max rpm. If the voltage is precisely controlled by PCM, that seems possible. The alternator charges the car battery in your Chevy Camaro and keeps the electrical accessories of the car working when the engine is running. This is noticeable at light loads and above idle RPM. The battery runs down frequently and I have to charge it and I'm not real sure how to find the source. Measure your voltage with the car off, then start it and re-check the reading charging voltage. Your alternator will charge a dead battery faster if it is running faster than idle but most of the time your battery isn't dead. Regards Sutripta. Open Charge Lamp: Some charging systems will not properly operate if the charge lamp bulb fails. After regulator detects alternator rotation, it gradually applies field current, preventing an abrupt mechanical load on accessory drive system. I wired the first one to a switch on my accelerator so at a red light there is zero charging (alternators put out poorly at idle), and then at speed, the second limiter kicks in to about 20% of full. This will help you to identify all the different wires and thus will make the alternator troubleshooting quite easy and convenient. YMMV As usual, if I am wrong it is because my dog ate my homework and it is definitely not my fault. And have an assistant raise engine speed to about 1500 RPM. airarms125. With close. is turning "very" slow @ idle it should have a voltage output towards 13. In fact, voltage drops from 12V+ with engine off to 11. South Main Auto Repair LLC 207,730 views. To test the alternator and regulator output, test the current flow from the alternator with an induction ammeter. Alas, still no charge at idle (12. This is a great feature but the stock alternator a CS 144 (CS is 'charging system and 144 is the OD of the stator in mm) is a 124 amp unit that won't always keep up when the engine is at idle (650 rpm) when a few other accessories like the defroster, heater and headlights are on. Bulletin date: Sept. It was even worse at night with the headlights on. 8 volts, so your battery's completely charged and the electrical system doesn't run it down. I was worried about draining my battery with my stereo, I no longer am. Have a meter? Charge up the Yuasa overnight and meter the voltage at the battery at rest. Bought new alternator from shucks, installed, no change replaced voltage regulator with another (not new but fairly sure it is good) The battery is fairly new but was low on water, so we topped it off. I do know the truck made this exact same noise when I bought it a couple months back, it was not as loud but it was definitely there. Check your car's manual or parts manual to see what your alternator's maximum amperage should be. Technically speaking, 12. Other sprinter vanlifers recommend it. Keep in mind that you might experience this scenario more often at idle speeds because an alternator will not be able to produce its rated capacity at low RPM speeds. Or if I rev the engine it creaps up too. That increased output. The charge indicator operates on the basis of opposing voltages. With a normal warm engine idle rpm of 1300, the charge voltage was 18. The alternator can do this since it is really three alternators in one body. Learn vocabulary, terms, and more with flashcards, games, and other study tools. If you have a common voltage meter put a probe on each battery terminal to see if the alternator is working or not. Shop, read reviews, or ask questions about BALMAR XT-Series, 170 Amp, 12 Volt, Dual Foot, J10 Pulley Alternator Charge Kit at the official West Marine online store. I have a 95 isuzu trooper type s a/t recently my batter went bad and was since replace. Your alternator is kind of like 3 generator circuits in one. 3, 2010 Information and Bulletins. 2001 chevy express van alternator not charging 2 Answers. Turning on the headlights to create a load on the electrical system. Until I turned on the a/c on or heater it went down to 11. To correct this concern, replace the existing alternator pulley with an improved part. Sympton: Battery slowly goes dead, but ammeter sometimes shows a positive charge. The “Charge Balance check” for a vehicle is done by first defining a worst case city driving cycle pattern – the % of time the vehicle will be in the different gears during the driving cycle and the corresponding average engine rpm in operation with each of the gear modes; then the corresponding alternator rpms in different gear modes. 1V at 800 rpm (engine), 13. I do remember in most charging systems check out voltage is associated with RPMs, I guess they assume the battery is in optimal charged conditions? Assuming that the battery SOC is good, like 12. So, if you’re driving down the highway (the alternator’s best output), then you’re still discharging your battery. High output aside, don't expect your alternator to do anything for you at idle speeds. The original alternator that it had when I bought the truck had a wire going to the voltage regulator that would turn the alternator on. Adding wiring for dedicated 2 nd auto eject – Every Idle reduction system will need a means to charge. 0 stock 110 alternator volts & amps at idle. alternator not charging without revving engine 4 Answers. This system consists of an internally regulated 270 amp alternator. 4volts on my powerFC which suggests the alternator is charging away happily. I put a voltmeter on the alternator output and confirmed that it would just sit there and idle while showing battery voltage only. If it is weak the base voltage would be lower. if the car sits idling on my drive I see a reading of 14. Output at idle, as compared to a similarly sized conventional alternator, is 2. Even at idle, there should be enough power coming from the alternator to run the car. The Mean Green Alternator can charge any engine no matter what its' power requirements. 9 Cummins is the answer to all of your charging problems. I also found that a 100 amp alternator should provide 30 amps at idle. Automobile engines run on air, fuel, and spark. Your alternator will charge a dead battery faster if it is running faster than idle but most of the time your battery isn't dead. The Mean Green Alternator provides up to 300% more power than stock. I've been checking voltage at battery each time before I start car and I get 12. Auto Electric can supply alternators for John Deere, Case, Kubota, and many others. That increased output. then i replaced the alternator with a high output one (150 -160 Diagnosing a car that dies while driving or at idle Check the fuel pump if your vehicle stalls when stopping at a red light and then starts right back up. 5V), then the regulator will stop applying voltage to the field and the alternator will stop charginghowever, once the battery drops below ~13. 0 V after several days. Auto Electric should be your go to supplier. A one-wire alt may stop charging at idle speed until you hit the gas again. Doesn't matter whether the car is on or not. This is why you get the pulse. Especially near idle charging was dramatically improved versus OEM. Alternator Light Stays On. alternators are bi-directional and will charge when spun in either direction. Typical charging voltage for a 12 volt system is 14. The amp reading on your meter should be near the maximum output. If the system voltage never goes to 14 volts or thereabouts when the tractor is running, the alternator isn't charging. 2001 chevy express van alternator not charging 2 Answers. 5 volts at idle!! By boxman420, December 23, 2011 in Electrical-battery- Alternators- Wiring. ” Charging amps are the total amps minus the ignition’s requirements. Technically speaking, 12. Below that the power output varies. as far as load goes, the alternator does it all on it own. I don't believe things magically fix themselves, so I sat on it and drove the truck to my in-law's house yesterday morning to go fishing. The older cars could get by with less than perfect performance. So sent my car in to get its 100k service due to leaking cam seals so while it was in I got the alternator rebuilt as well but now doesn't charge at idle. Alternator may. Replaced the alternator and voltage regulator, problem went away. The belt (from the crankshaft) connects to a pulley system, called the rotor , so that when the belt is turning, it moves magnets across a special. Remove the alternator belt and see if the noise goes away. two front mounting bolts, and two on top for a support. I think I'm right that I need to fit a smaller pulley to get it to charge at 1,000. The “Charge Balance check” for a vehicle is done by first defining a worst case city driving cycle pattern – the % of time the vehicle will be in the different gears during the driving cycle and the corresponding average engine rpm in operation with each of the gear modes; then the corresponding alternator rpms in different gear modes. Still, it's perfectly normal for others to see the alternator not charge at all intermittently. No other APU offers the combination of air conditioning, heating, cab power, engine warming, truck battery charging, optional shore power connectivity and a 2,000-hour maintenance service interval found in the ComfortPro diesel units. General Motors type 80 amp alternator upgrade kit, fits Delco Remy type 10DN series external regulator alternators from 35 to 65 amps. Start studying Charging Systems. premium alternator by Today's Trucking Staff August 1, 2014 Bosch’s ultra-premium Long Haul Alternator for heavy-duty vehicles provides greater electrical power and efficiency on the road or at idle, the company says, and is designed to keep generating electrical power even when underhood temperature climbs to as much as 125 degrees C (257. It will take around 20 min to put a hefty charge in a almost dead battery when the car is at idle, and it jumps to around 5-10 min when the RPM is brought up. 4V by time I obtained parts). something volts (alternator not charging) Rev to 2000rpm, alternator kicks in (14. During the idle of the engine, the charging system don't really produce much current into the battery at all. The 94A 12Si will put out 68amps at idle vs the 10Si peak of 63amps. The battery-charging alternator. Small Diameter Alternator Pulley. When the engine starts, the battery is drained by starting system down to bout 10V, afterwards during idle the alternator recharges it to 12. is turning "very" slow @ idle it should have a voltage output towards 13. If I bump the throttle to 1400 or so the alternator then works perfectly even at idle. Alternator charging at 18 volts, replaced alt and didn't fix. Often times the battery is taking up part of the load. It's charging at 14. I then replaced the alternator because the battery was not very old. Driving a car with a dead battery can also damage the alternator. Adding wiring for dedicated 2 nd auto eject – Every Idle reduction system will need a means to charge. I have 13-14 volts at high idle. This also allows the alternator to nearly double its output during idle conditions. I couldn't get the fuse to blow. Tell us which alternator, one-wire or three wire, amperage rating would help also. 3L Ford Ranger, you'll need to charge it up enough so that the car can idle for about 5 to 10 minutes (while you perform the test). 6 volts to charge a battery. The Mean Green Alternator provides up to 300% more power than stock. 8 volts and our YELLOWTOP® and BLUETOP® batteries are fully-charged at about 13. an Alternator Better Battery Life Another added benefit of oversizing the alternator is the positive impact it can have on your batteries. Especially at idle. And I'm wired up with 0 gauge lol. Most modern car alternators output about 100 amps at max rpm. This diagram shows how to wire a Delco (GM) internally regulated 3-wire alternator. about 900 engine RPM even with steeda underdrive pulleys, and the stock alternator pulley. Wiring harness at the alternator. I do have parasitic drain which I haven't fixed yet, and that draws the battery down to around 12. Tell us which alternator, one-wire or three wire, amperage rating would help also. N606068-s100. Also, I was only drawing 500 watts and this was an emergency which only lasted 5 days, I did not attempt this again as it damaged my car battery since the system isn't designed for. With Key On Engine Off, the voltage on L should be low (near zero). It takes a certain amount of rpm to get the alternator working and. After running a minute or two, the idle changes slightly and the voltage drops to 11. This is usually a bad diode in the alternator, less often a bad regulator. With a product line of over 675+ part numbers and over 30 years of experience in the alternator business, O. 5 and 15 volts of power. Also the charge lamp is basically wired between the alternator output and the battery so that when the alternator is charging both sides of the lamp are at the same nominal +12 volt level with another resistor to the battery common/ground. as far as load goes, the alternator does it all on it own. The dealer had it yesterday, reprogrammed the BCM, and now the voltage goes up to 14 at startup/idle without a quick rev. It will also stay on and charge at idle once I do that. I would at the very least have your alternator checked out and see what it's really putting out. ) - its all about optimisation and not charging at idle in gear is an easy trade off. I have an automatic charging relay that limits the voltage to between 13. However, the alternator gauge needle moves towards charge with acceleration and pegs out on charge at about 2500 rpm. If the system voltage never goes to 14 volts or thereabouts when the tractor is running, the alternator isn't charging. 4 Your problem is likely either a bad alternator, dirty electrical connections, or both. something volts (alternator not charging) Rev to 2000rpm, alternator kicks in (14. D) is designed for use on Delco round shaft style alternators in applications requiring aboost in or higher voltage rate from the charging system at an idle. 0 V after several days. 6 times greater. I have a small charging problem. Someone wrote with an interesting question about the alternator "idiot" light - My 1970 engine is equippedd with an alternator that has an internal regulator. So the first thing the would-be fixer of his charging system wants to do is determine how it's performing. The alternator produces a maximum of 270 amps and will produce a minimum of 170 amps continually at low idle speeds and maximum output above 1800 engine RPM. It's inside the alternator itself. This diagram shows how to wire a Delco (GM) internally regulated 3-wire alternator. If the ammeter shows a charge, the problem is in the regulator. at idle when amp clamped it should be around 45-50 amps output. In the past it charged 13. The ECM will also controls the engine run relay, which only allow circuits with a high current demand to be activated when the alternator is charging, until which point the components remain inactive. The higher the voltage the more. Being the truck is a 93 with serpentine the alternator should be a 3G 130amp unit. I would at the very least have your alternator checked out and see what it's really putting out. 8 while running/charging. disturbances that occur at idle speed. The alternator must be failing at the brushes and the regulator. Sometimes when the alternator becomes weak, you may notice that your car's headlights and dash lights become dim at idle, but get brighter at higher RPMs. Just wondering should the charge back to the battery be 13. If it is the type I think it is the Engine ECU does not control the alternator charging. It all comes from the battery. ) Yesterday I installed to voltage meters and strangely noticed the fluctuations on the voltages coming from the alternator. At low RPM and high loads, the alternator's output is significantly reduced. It frees up horsepower at idle, but it loads the system heavier when you rev up the engine as the alternator tries to catch up on missing battery charge! When alternator shaft speed is reduced, the voltage regulator turns up the field current. 4) check the battery Voltage. The alternator then quits charging completely and voltage drops to 12. A worn or stretched alternator belt that is working fine on your stock alternator will slip on a high amp alternator and cause a no charge or low output condition due to excessive torque created by the new high amp. Someone wrote with an interesting question about the alternator "idiot" light - My 1970 engine is equippedd with an alternator that has an internal regulator. Remove the inductive pickup, and zero the ammeter. The alternator must be in a proper, working condition. With the scan tool read the active DTCs. I also have a battery tender volt meter (connects to the battery tender volt meter), it also confirms that at idle, I'm charging. Connect the alternator connector. If you’re idling the engine in a parking lot, it’s even worse. Note: Do not use small gauge wire to connect your alternator into your electrical system, small gauge wire will not carry the correct current. Show Full Signature. Get ready to load your ROXOR up with the power to drive all your accessories with this new 120amp alternator. something volts (alternator not charging) Rev to 2000rpm, alternator kicks in (14. Check your car's manual or parts manual to see what your alternator's maximum amperage should be. Large red power cabl. Very few alternators charge much at idle or low RPM, high output or not. To test the alternator and regulator output, test the current flow from the alternator with an induction ammeter. The large case 1G and the 130 amp 3G's are very powerful even at normal idle speeds above 750 engine rpm. Turning on the headlights to create a load on the electrical system. disturbances that occur at idle speed. I then tested voltage at the battery while idling at 700 rpm voltage at 12. last time I had this (on my '69) I ignored the red gen light and ended up hitchhiking. The alt maker can supply you another pulley or perhaps a local alternator shop like Bronx. ) 5) Increase motor speed to about 1500 RPM. All of this is with the fuses pulled for my aftermarket stereo, but the problem is likely caused by over stressing the charging system from its use. The Mean Green Alternator provides up to 300% more power than stock. 6 volts within about 10 minutes, and then taper back down as the batteries reach 90% to full charge. So unless there’s an expected difference in my 2012 model, I suppose this is a bad sign. 4volts on my powerFC which suggests the alternator is charging away happily. Most hot rodders and muscle car enthusiasts prefer the use of a volt meter or ammeter to monitor charging. The most recently reported issues are listed below. If you have noticed the charge has been slowly declining over a period of several days, I would guess it may be the voltage regulator. Wiring an alternator. look under the hoods of Caprice cop cars and station wagons. Next, inspect all wire connections. ) - its all about optimisation and not charging at idle in gear is an easy trade off. The stock alternator usually dies trying to charge dead batteries because of low cooling airflow at idle, combined with low temp rated electronics in the end, as well as a 1900’s telephone system type connector block. Yes, the alternator does charge the battery in your car but it must fulfill two criteria: The engine must be running (even at idle, the engine runs). Tap the alternator carefully with a hammer while the engine is runnin; if the charging goes back to normal, the coals inside it are worn out. A while back the alternator light started flickering in my 78 LTD, and began to do it increasingly. I could see the alternator temp rising, getting to 120, the current going to zero, the alternator cooling to about 110C, the current coming back, rinse and repeat. Now the alternator does not charge. Definitely yes, you can unhook the positive battery terminal to test the battery while the vehicle is running. Adding wiring for dedicated 2 nd auto eject – Every Idle reduction system will need a means to charge. With the scan tool read the active DTCs. The problem is WITH the actual NEW marine battery, as your alternator is pushing out charge, the marine battery doesn't accept the same amount of charge as the speed of charge as a normal car battery, this means that when your driving at night for short periods, the marine battery will not accept the amount charge that you have used during. Alternator Light Stays On. we tested the alternator but it is fine at 15 amps. Connect the alternator wire and install the nut. The PCM has the ability to adjust charging system voltage according to the electrical. Check the generator/alternator wiring harness and the connectors at the regulator. the alternator is charging. 56 will be good for 3:1 50 will be good for 3. If it cannot then it is not working right, but it could also be a regulator problem or something of the like. e 13 09 86 (1179) and 13 10 86 (1184). Joined Jun 4, 2008 · 783 Posts. the voltage a/c across the two wires is the most important thing to measure,I got only 3. Automobile engines run on air, fuel, and spark. Wiring harness at the alternator. Have your "auto-electrician" replace the regulator/brush holder on your alternator and top off the water in your battery, the water level might be low from the alternator over charging. The vehicle won't start at all, or will crank slowly. Alternator Light Stays On. It takes a certain amount of rpm to get the alternator working and. 5 amps average (let's say 40). NO WARNING LIGHT Note that a 1-wire alternator does NOT permit the use of a charge warning (idiot) light. This was back in 2013, now in 2015, I began to have and intermittent alternator fault warning, until it became permanent and stop charging the battery and letting me hanged half way home. The Mean Green Alternator can charge any engine no matter what its' power requirements. if tapping alternator makes it charge it is probably brushes,that means a new alternator or put brushes in yours. I never knew that the alternator charging voltage drops when the battery charge is low. 4 volts, discharging the battery. 8 at idle, but when at high rpm always when to 13. It will take around 20 min to put a hefty charge in a almost dead battery when the car is at idle, and it jumps to around 5-10 min when the RPM is brought up. Alternator not charging. I managed to nurse the car home by revving it a lot, and after 2 miles suddenly all the electrics came back to life. with no load on getting around 14. Ford "Smart Charge System" Alternator Not Charging - Duration: 40:02. Voltage at the alternator output was essentially identical to that at the positive terminal of the battery. Battery: Provides power necessary to start the vehicle, and powers accessories when the engine is off. There was some concern that an alternator/regulator designed for a tractor might produce a lot of RFI noise that would interfere with NAV/COM radios. 5V at idle because I am only getting that at 3000rpm? My battery was dead the other day had the battery, sub tank and A/T oil temp lights on dash before it died. Issue: When the car starts cold, the charge voltage from the alternator (measured at the battery terminals) is 14+vdc. ” Charging amps are the total amps minus the ignition’s requirements. 4) check the battery Voltage. Probably 10-20 amps, which is not enough nowadays. Especially near idle charging was dramatically improved versus OEM. A normal alternator should also produce a perfectly straight line response when monitored over an oscilloscope in DC position. If you’re idling the engine in a parking lot, it’s even worse. So does this seem ok? I know plowing is hard on trucks, but thought the alternator would do better even at idle. The charging system warning light on your dashboard might flicker on at times, especially at idle with the air conditioning and headlights turned on. Definitely yes, you can unhook the positive battery terminal to test the battery while the vehicle is running. Now the alternator does not charge. Idle was at 12. All charging system related fuses and electrical connections for damage or looseness. alternator. If you are having problems with overall alternator output or charging at engine idle, maybe a smaller pulley is all you need. Disconnect the alternator lead And start the engine. After start-up, the alternator(s) is busy trying to replace used energy, and the voltage will typically be 13. Alternator not charging at idle. At about 2500 RPM battery and charging system current is in balance. When the alternator in your Chevy fails or loses capacity, the electrical systems will only work until the reserve charge in the battery is depleted. 6 sometimes 13. Tell us which alternator, one-wire or three wire, amperage rating would help also. The function of the plug is to run a charge indicator (Idiot Light) only. Install wiring harness clamp bracket with bolt contained in kit. The alternator should be able to charge a battery at an idle. 5V at idle because I am only getting that at 3000rpm? My battery was dead the other day had the battery, sub tank and A/T oil temp lights on dash before it died. If I bump the throttle to 1400 or so the alternator then works perfectly even at idle. Senior Member. My other Burb at idle shows 14. Idle amps at 102 and at peak 168, far better than the old one. Alternator: Provides power while the engine is running. In some cars, the voltage could go. Mostly because all voltages are regulated up this way. For rear mounted batterys with charge wire lengths between 10 to 15 ft use a 6 AWG cable. The 94A 12Si will put out 68amps at idle vs the 10Si peak of 63amps. It could be my computer or pulleys in the wrong too so I can't risk buying a new one and still having the problem. For example, say an engine produces 27 amps in total. Your alternator will still function properly and will provide electricity to your car battery to be able to charge it regardless of if you are in neutral. I used a multimeter to test it, at idle it was showing 12. 6v and continues to drop if I drive around the village a bit. 64 v each time so I feel confident that it is getting enough voltage to charge while driving. 5V, but it will drop as things warm up. Normal Output An alternator should put out between 13. For rear mounted batterys with charge wire lengths between 10 to 15 ft use a 6 AWG cable. Show Full Signature. A method of controlling idle speed of an engine comprising: operating an alternator to provide an alternator load when an idle condition is detected; detecting a load increase on said engine; and reducing said alternator load on said engine in response to said load increase to maintain said idle speed of said engine. The autoparts purchased alternator was only charging my battery at around 13. 5 and 10 ohms. With my pulley ratio I'm well below the alternator max rpm at my engines max on track rpm. Install wiring harness clamp bracket with bolt contained in kit. -Replace the defective part. So to answer your question the faster your alternator is spinning the move of an output you'll have to the batteries. It might be the 2m cable voltage drop. When you are at idle, the alternator is not producing a sufficient charge in order to maintain the amperage load of your rig. The battery charging alternator provides a source of electrical current for maintaining the storage battery in a charged condition and supplies sufficient current to carry any other electrical load requirements up to the rated capacity of the alternator. If this is not a good solution, you might be able to get a double idler pulley to increase the speed, small pulley getting drive from the crankshaft coupled to a large pulley to drive the alternator pulley. If left at idle all electric systems will slowly draw down the battery. Powermaster Alternator is designed to work as a 1 wire without any connections to the plug in. Checked the charge voltage at idle across the battery while the engine was running, and it can back under 12V (it may have been as low as 11. The test the battery/alt at idle for theno load test then they have you turn on blower motor, radio, etc and run the truck up to about 2,000 rpm for about five seconds and test the load. Charge Indicator The purpose of the Charge Indicator is to advise the driver that the vehicle's electrical system is not operating at peak efficiency and service should be performed. - If the alternator starts charging, the regulator is likely the problem. Revving the engine won't help: jumpstarting draws amps from the good battery, which is unaffected by. The Mean Green Alternator can charge any engine no matter what its' power requirements. It compares battery voltage to charging voltage. The charging voltage should be between 13. an Alternator Better Battery Life Another added benefit of oversizing the alternator is the positive impact it can have on your batteries. 4 Your problem is likely either a bad alternator, dirty electrical connections, or both. If you are reading 12 volts or lower, the alternator is not charging. Now repeat the charge amps test, but this time, DO NOT EXCEED 3000 RPM, the voltage could go dangerously high. At idle (700 RPM) it doesn’t make enough voltage to charge beyond a float level. BUT,need to know what the voltage ,ond ohmage should be before I. ) - its all about optimisation and not charging at idle in gear is an easy trade off. checked voltages at alternator connector (backprobed terminals with connectors connected) with truck off, koeo and koer at idle; results as follows: terminal c at alternator which is gry wiregoes to pcm and is the off/run/crank volts field duty cycle signal key off eng off 0v, koeo 2. I'm not sure what effect cold temperature is having on your engine/alternator, but brining the RPM of the engine up will raise the voltage and increase the ammount of potential amperage output of the. Charge Wire Size. To properly check the alternator, you need to measure current output NOT voltage. RE: Alternator Charging IP: Logged Message: Mine is charging between 14. You won't get the nice idle flare-up to 1500 rpm at start-up, and it will tend to stall at stop signs. Connect the alternator wire and install the nut. A Promaster dual alternator bracket from APS allows for the installation of new primary and/or secondary alternators for increased charging capability, ample power at idle or both. (rock auto $82. If it's pumping up the charge when you rev it, but dropping at idle, I would guess it's the regulator If it was the alternator, the charge would be low all the time The battery probably ran dry due to the constant discharge and irregular recharge rate. Honda measures alternator output at normal operating temperatures. So does this seem ok? I know plowing is hard on trucks, but thought the alternator would do better even at idle. You may not have a problem. 4 volts, discharging the battery. It might be a bit higher, 15 or so, if checked just after starting but it should settle back down to around 14 after a bit. 7 volts at idle and 14. then back to 13. brushless, requires 2300 rpm minimum idle speed part of 135-3224 alternator gp-charging field replacement order @@@@@ [email protected] @@@@ 9x7803: alternator group-charging section: electrical and starting system: 9x-7803 alternator gp-charging s/n 5zs1-up 24-volt, 100-ampere. In some cars, the voltage could go. So, I can say that I am not 100% sure it is the alternator. disturbances that occur at idle speed. If the alternator was bad it should be non functioning all the time - or is my logic incorrect here and the heat has some effect? John. when the regulator says dont charge, it drops to zero output, not a fade to zero as with others. I have a small charging problem. if you are in the 12 range at idle then you are running strictly off of the battery. Luckily for us two of the key Ford alternators we like to swap in do in fact have very good idle charge characteristics. wolfman is correct you can bend a cheap 10mm ring spanner, and remove that hidden nut. The test the battery/alt at idle for theno load test then they have you turn on blower motor, radio, etc and run the truck up to about 2,000 rpm for about five seconds and test the load. Again this makes me frustrated since it seems like the alternator is capable, just not willing to charge at idle. After the battery recovers, the output might go down to just over 13 volts, depending on if you have your lights on, radio playing, blower motor running, etc. Start studying Charging Systems. This is a great feature but the stock alternator a CS 144 (CS is 'charging system and 144 is the OD of the stator in mm) is a 124 amp unit that won't always keep up when the engine is at idle (650 rpm) when a few other accessories like the defroster, heater and headlights are on. Replaced the alternator with a new/reman'd one today. And both standard and superbugs had the same alternators from 71 onwards so there is no specific superbug alternator. When you ground the tab the motor should idle down as it comes under load, so you shouldn't even have to look at your voltmeter to see if bypassing the regulator made the alternator charge. - If the alternator starts charging, the regulator is likely the problem. At rest the voltage should be ~ 12. Check the generator/alternator wiring harness and the connectors at the regulator. If you are reading 12 volts or lower, the alternator is not charging. How an alternator is tested Computerized battery and charging system tester. It compares battery voltage to charging voltage. Bought new alternator from shucks, installed, no change replaced voltage regulator with another (not new but fairly sure it is good) The battery is fairly new but was low on water, so we topped it off. 5v (back and forth). If the system voltage is around 14 volts when the tractor is running, then the alternator is probably working and you probably have a bad battery or a bad connection to your battery. But six weeks ago after I had the battery replaced, idle speed dropped to near zero. two front mounting bolts, and two on top for a support. The alternator (or generator) converts rotary power from the engine into DC current to charge the battery-that’s all! Clip the alligator clip to a good ground (no rust, paint, grease, dirt, or shit!) and touch the probe (make sure your remove the safety shield) to each post of the battery. alternator is belt driven from the crankshaft pulley by a. What headlight? Some H4 auto bulbs are higher wattage than the typical MC alternator can handle at low speed. Connect the alternator wire and install the nut. The alternators amperage output must never reach its maximum available output. when idle it would. 4V by time I obtained parts). You won't get the nice idle flare-up to 1500 rpm at start-up, and it will tend to stall at stop signs. My Duratec has a 40amp Brise alternator with 75mm pulley, at 1,000rpm idle it's not charging although the ignition light goes out. , and lead acid batteries , as part of there. See if you get any real AC volts on the line (bad diodes). This nifty little kit helps excite the alternator wire earlier, which allows the alternator to charge the vehicle immediately upon start-up. Service Issue: 6. At about 2500 RPM battery and charging system current is in balance. Experimental Notes: The Hummer has a electric window heaters in the windshield to melt ice and snow in the winter. Alternator: Provides power while the engine is running. 5volts so ?? the resistance from each wire to earth, was 3. ComfortPro® diesel auxiliary power units (APUs) from Carrier Transicold are the trucking industry’s all-around performance leaders. 4v at idle with no major electrical loads, at 2500 rpm with normal electrical loads on (dipped headlamps, heated rear window, heater blower on slow speed) the voltage should not drop below 13. A Vanner HBA® eliminates hydraulic lines when powering electric cooling fans. 56 will be good for 3:1 50 will be good for 3. For some alternators, it's normal to see as low as 13 volts. 3V and after driving for around 1/2 hr, it drops down to 14. Keep in mind that you might experience this scenario more often at idle speeds because an alternator will not be able to produce its rated capacity at low RPM speeds. I've been checking voltage at battery each time before I start car and I get 12. 06-18-2018, 11:17 PM #9 learned idle points - so if your. If it does, simply replace the alternator with a rebuilt and see if the problem goes away. This one is charging at around 14. This is why you get the pulse. The proper voltage forces more current into the battery bringing it to a full state of charge between vehicle stops. it charges at 14. Honda measures alternator output at normal operating temperatures. 7 or higher with blower heater and seat heater on high. 0 stock 110 alternator volts & amps at idle. At idle, with my 400W amp, stereo, and other electronics, it shows as charging. I spoke to Manie and suggested I do a separate line for the voltage sensing. Joined Dec 12, 2013. The alternator's charging output increases in proportion to the electrical load on the charging system and engine speed. My AEA 120A alternator charges around 13. At idle, the alternator will be turning, but it likely will not be producing the maximum current available. Remove and clean all charging system electrical connections from the alternator through the batteries (this includes the ground side). 2001 chevy express van alternator not charging 2 Answers. If understanding not avaliable suggest a professional auto electrical shop. 1G to 3G Ford Alternator Conversion. However, Ian's coil swap is a neat idea for a quick check. But all 2003-2010 crownvic alternators use the same signalling setup in between the alternator and the pcm. I made sure everything was hooked up and it was so i started the car and it doesnt charge. 5 (75% charge) to 12. At higher speeds and 14 V output the alternator delivers more power (up to about 1500 W at 6000 rpm), but does not achieve the maximum power possible if voltage were varied because of the way the power-voltage relationship changes with speed. Most hot rodders and muscle car enthusiasts prefer the use of a volt meter or ammeter to monitor charging. Bulletin date: Sept. A worn or stretched alternator belt that is working fine on your stock alternator will slip on a high amp alternator and cause a no charge or low output condition due to excessive torque created by the new high amp. ComfortPro® diesel auxiliary power units (APUs) from Carrier Transicold are the trucking industry’s all-around performance leaders. This also allows the alternator to nearly double its output during idle conditions. It should not go under ~10. And both standard and superbugs had the same alternators from 71 onwards so there is no specific superbug alternator. The innovation that made this possible is the new hairpin stator technology which greatly improves efficiency. the voltage a/c across the two wires is the most important thing to measure,I got only 3. A smaller pulley will get the alternator's RPM up and charging at a more reasonable rate during idle. I'm thinking that the battery was probably close to being drained from having the car running just off of the battery power before the alternator swap. You’re able to reduce the depth of a battery’s discharge— also known as cycling. I changed the alternator because the old one crapped out, was not charging the battery, battery light was on, had barely 12 volts according to the meter. Emergency Shutoff.