How do I check the wiring that plugs into the alternator? The plug has 3 wires.
I do not know what they do so not sure if when checking if engine needs to be running or off or what is ground and what is power. I do know the main red wire going to alternator has power.
#1(orange & gray stripe? This wire is a little heavier gage than the other 2)
#2(White with black stripe this wire loops back into the alternator with a plug)
#3(green with black stripe?)
Alternator bench test good, but when on car it shows bad. Battery test good. Fuse test good with ohm meter.
Test battery with volt meter engine off about 12 volt. Test battery with engine running the same voltage. Put one test lead on neg post on battery and other touching red main wire on alternator same voltage about 12 volts. The reason aims saying about 12 volts because using cheap volt ohm meter with small lines.
have the same problem?
Tuesday, October 6th, 2009 AT 12:38 AM