Reply to "Alternator Light always on"

mkehMember

The alternator is back in the shop with wiring diagrams and details...

I was getting resistance in one direction only between B+ & D+ which indicates (from previous comments) that the diode is working correctly. I asked if it was possible the diode was somehow reversed, they said they didn't see how. But would look into it...

From what I can tell D+ goes to both the VR and the Gen light, then to the ignition switch. If the switch is on it gets power, if the switch is off it goes to ground. Somehow B+ is backfeeding power to D+ and with the switch end of it grounded the light comes on.

What is perplexing to me is that with the key off D+ (wire to switch) is grounded... if B+ is backfeeding power to it then this explains not only the light coming on, but also the load being placed on the system which drains the battery. But the load seems to be far more than just a little light bulb...

Hopefully they'll figure it out...

Thanks for the thoughts and suggestions...

MH

2/27/1811:48 AM

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