Quote:
Originally Posted by Rsbhunter
I posted about the same condition. I replaced battery with a new one, 12.7 on batt, replaced alternator, 14.1-14.2 after starting , 13.7-14.0 idling. Checked every fuse, engine bay and dash....all good. Starts fine, runs fine, just was on after sitting for a week. Where are the ground wires? I know about the one on the fender by batt. Any others? Sorry to hijack thread, but this is maddening... rsbhunter
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The Battery light is supposed to come on when you turn the key on because the Gauge fuse is sending power to the light and it is grounded in the voltage regulator inside the alternator. When the engine starts and the Alternator is charging, the voltage regulator sends output voltage back to the light, which turns off the light since it no longer has ground. if you could back probe the gray wire on the alternator plug, you should see alternator voltage when it is running, if not, the internal voltage regulator is bad. Which in essence means replacing the alternator unless you are crazy, like me.
