Posted by mkirsch on December 27, 2011 at 08:23:58 from (64.80.110.75):
In Reply to: alternator exciting posted by INCase on December 26, 2011 at 16:58:23:
The idiot light is too much resistance. Resistance reduces voltage. The alternator is not seeing enough voltage to properly excite through the idiot light.
GM's solution was to add a resistor in PARALLEL to the idiot light. Adding resistors in PARALLEL actually has the effect of REDUCING resistance, and INCREASING voltage to the alternator excite circuit.
If you want to make it work correctly, withOUT any hacks, add the resistor mentioned earlier across the terminals of the idiot light. That will fix it.
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