Alternator hookup
Thread Starter
Le Mans Master
Joined: Oct 2007
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From: Richmond Kentucky
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Alternator hookup
Anyone here used one of those "one wire" alternators? I have one for my 68 and would like to know exactly which "one wire" to connect to the alternator.
Thanks,
Rex
Thanks,
Rex
Safety Car
Joined: Oct 2007
Posts: 3,729
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From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
the correct answer is none of the above,
you and your car would be much better off,
using the OEM type 3-wire design alternator.
69VETT
you and your car would be much better off,
using the OEM type 3-wire design alternator.
69VETT
Le Mans Master
Joined: Oct 2006
Posts: 7,123
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
However, to answer your question, run a new 10ga wire from the alt output to the hot all the time post at the horn relay. Be prepared to fight with battery charging. The one wire thing dosen't really sense the battery properly so it'll have a hard time keeping up with different loads on the electrical system.
Le Mans Master
Joined: Oct 2000
Posts: 8,897
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From: Santa Ana CA
I have a 1-wire 100-amp alternator and have had no problems with it. I simply connected the existing red "Batt" wire from the old alternator to the new alternator. While it is grounded through the case/engine, I also connected the existing black ground wire to the case. Hey, it was right there and couldn't hurt. I clipped of the plug for the field and lights and tucked those two wires back into the loom. 
