How to Test an Automotive Alternator - 2CarPros
2022年3月13日 · The next step is to load test the alternator to see if it can hold up under heavy usage. While the voltmeter is still hooked up and the engine still at a raised RPM turn the headlights and air conditioner on full. This will demand an electrical system load which will force the alternator to perform to its maximum output.
Parasitic drain caused by alternator diodes - 2CarPros
Each phase uses two diodes at one time, then another two, then a different two, over and over. Because the diodes are shared between the phases, one defective diode causes a loss of 2/3 of the alternator's maximum current capacity. During a professional full-load output test, all you'd be able to get is 30 amps from the typical 90-amp alternator.
What could cause an alternator to test bad on the car but
Both the battey and alternator tested bad while on the van. I removed the alternator and had it bench tested and it was good. Not sure if I should put it back on and see what happens. Before I took the alternator off I drove it home with the new battery and the battery light was stil on. My alternator is the 130amp with the internal regulater.
Testing alternator or other component in the charging system
2020年6月12日 · I removed the original alternator that I thought I damaged with the wrench and took it for a test. The person who ran the test said it was a good alternator, but I don't have any specific data. With the alternator disconnected from the car, the diode test provided a different result. Now, I'm not sure the problem is the alternator itself.
Code P1381: My Wife's 2002 Honda Accord Is Throwing a Code...
Apparently the sensor is built into the distributor, so that has been replaced, but the problem remains. I was told I should test the alternator, so I did. I tested that the battery was getting charging voltage and did a simple diode test from the post on the distributor to the distributor casing, and all seems to be fine in that neighborhood.
2003 Toyota 4Runner Open Alternator Diode? - 2CarPros
He hooked a device up to my battery terminals and reved the engine several times, and then printed out some computer results, informing me that my alternator has an opn diode. He said that was probably reponsible for why my first battery was drained and would most likely kill this new batterey within 48 hours if I don't have the problem fixed.
Alternator Charging Problems?: Alternator Is Only Putting
2020年8月10日 · Next take a test light and unplug the alternator, turn the key on but don't start the engine. Use the test light and check all three of the pins in the harness connection for battery voltage. With the key on they should all show battery voltage because they are being fed power through the fuses and the ignition switch.
Alternator Not Charging: I Was Helping My Dad Replace His
Many cars today with perfectly good generators will stall when the battery cable is removed. Also, with one shorted or open diode inside the generator, the engine will still run but you will lose two thirds of the generator's rated capacity. You need a load test and a ripple test to find that.
Alternator Replacement Instructions ?: How to Remove the
If it indicates an open diode, the alternator is bad. The ripple or AC volts is too high. Replace the alternator. Roy REMOVAL 1. Disconnect the battery ground cable. 2. Remove the air intake tube. 3. Relieve the accessory drive belt tension and move the belt off the generator pulley. 4. Raise the vehicle. ImageOpen In New TabZoom/Print 5.
Why is my battery ground Bolt hot? - 2CarPros
2024年12月16日 · Those include "full-load output current" and "ripple voltage". Even when output voltage is good, one failed internal diode of the six will result in the generator being able to develop only exactly one third of its rated current. The standard generator for your model is a 150-amp unit. With one bad diode, the most it can develop is 50 amps.