Has anyone installed a one wire chevy alternator in a classic mustang?

Purple Stallion

New Member
Jul 15, 2004
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Hey guys. I've got a 69 Mustang Mach One with a 377 stroker with air conditioning(added eventually). I have a Chevy one wire alternator. It belongs to any vehicle from 1973 to 1987. It has two red wires coming out of the battery stud of the alternator-one says alternator output and a small gauge red wire(16 gauge) and it has two prong connection below it one says "S" and the other "I". Do any of you have any idea why there would be two red wires coming out? Please let me know?
 
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Yep. One goes to the battery, larger wire. And the other is for ignition to turn the alt. "on". The other is just for a voltage gauge used by the factory. I just jumped the two smaller together and ran it to the ign. wire.