jonus079 Posted April 19, 2007 Share Posted April 19, 2007 what does the plug on the back of the alternator do(not the battery cable) ? i have a simplfied wiring harness for my car but i want to use a smaller alternator, not the one thats used on the ls1. can i just not use this plug? my guess is its just for the battery light in the dash. Quote Link to comment Share on other sites More sharing options...
mark Posted April 19, 2007 Share Posted April 19, 2007 THe fat wire out of the alt. sends current to the battery. The smaller wire that plugs into the alt. is the sensing wire. It tells the alt. when to charge. On my harness, I have only one wire that goes to the plug. There are provisions for 3 or 4 wilres in the plug. You only need one for it to work, I think it is a white wire on my my harness. The others are probably for an idiot light on the dash. Quote Link to comment Share on other sites More sharing options...
jonus079 Posted April 21, 2007 Author Share Posted April 21, 2007 thats what i needed to know, thanks. Quote Link to comment Share on other sites More sharing options...
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