Thread: Alternator Idiot Light!

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Per the diagram, I'll rewire the main battery wire and run it to the fuse block instead of direct to battery (I'm assuming 'batt' fuse). I'll do the same with the #2 exciter wire and run it to the fuse block instead of jumping it in with main battery wire off the alternator and see if that makes a difference.

Denny, as usual, is right on the money. If the voltage is fairly equal on either side of the light it will stay off. If the light is on it means there is a difference of voltage from one side of the light in reference to the other (potential difference) which creates current flow and the light illuminates.