Reply to "Alternator Light always on"

mkehMember

Perhaps my understanding is as bad as my phrasing... if the ignition switch is off and you put power to the D+ (backfeeding) the light will come on, to me that means the ignition switch is going to ground when off. But there may be more to it than such a simple answer...

if you ground D+ and turn the switch on then the light comes on as expected.

If everything on the alternator and VR are connected normally EXCEPT the B+ then all works as expected. As soon as you connect B+ the light comes on regardless of where the ignition switch is and there is a small spark when you touch B+ wire to the B+ terminal.

I'll have to verify tonight, but based on what I've seen, using your diagram the VOM would read a ground (continuity) with the key off and 12V+ with the key on.

I'm tempted to just cut my losses and go to one-wire alternator configuration, but I'm $200 into this issue that started off as just a noisy bearing... I wanna see how it ends!

MH

2/27/181:10 PM

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