I have a 1995 LT1 i have swapped into a 1973 pontiac ventura. I believe it is an iron head out of a caprice.
I cannot get the alternator to charge i had been hooked into the caprice harness, then i used a hot wire from stock (pontiac) harness produce output voltage because the caprice harness did not seem to produce voltage. I had it charging then for some reason it quit. I replaced the alternator because i thought i had diagnosed it as bad because it quit outputting. I then went to ls1lt1 forums and they said it needed a 50-450 ohm resistor i tried various resistors in line from radio shack but still no good so i got another alternator still nothing. I made sure the case of the alternator was grounded. Here are the links to the other thread as well as pictures





Both wires are brown on the connector.


http://www.ls1lt1.com/forum/showthre...232#post318232

 

Yes, you need a 480 ohm resistor inline with the exciter wire to the alternator.

http://shbox.com/ci/ci417.jpg