Alternator wiring help
Thread Starter
Instructor
Joined: Mar 1999
Posts: 219
Likes: 2
From: Gainesville Florida
Alternator wiring help
I have to replace the pigtail on my 94 alternator and the replacement one has the 3 wires like the old one but the 2 smaller wires are both brown and the oem harness is also 2 brown wires. The question is ,I have already cut off the old pigtail without marking them (stupid move I know) and now I am worrying that the 2 brown wires can be mixed up. The question is does it matter which BROWN wire on the pigtail is connected to either BROWN wire on the harness? I hope someone understands the problem and has an answer before I go to start the car up again
. Any help would be appreciated.
thanks in advance for your help.
. Any help would be appreciated.thanks in advance for your help.
Last edited by Les 94 Comp Yellow; Oct 9, 2011 at 09:31 PM. Reason: Miss spelled Alternator in Headline
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
I'm probably outdated on this one, but, big wire is odvious, one of the other wires 'excites the alternator and gets it to start charging, the other used to go to a resistor to keep the noise out of the radio speakers, its been so long , dont think it matters which of the other ones hooks to which. I'm probably mistaken, but if i've got it wrong someone will chime in soon and set things straight, so hang in
Burning Brakes
Joined: Feb 2006
Posts: 1,177
Likes: 0
From: VALENCIA PA
just had this fixed on my 92 any good alt shop can tell the wire order..my alt was different than stock so the plug got screwed up....if u get it wrong nothing will happen right away but you bat will die and you will eventually fry your alt..(dont ask me how i know this ) you have to get the wire to start charging to the right pin on the alt 
that was it, then check your volt meter , if it shows charging, you're good, if it doesnt , reverse them
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
This is how a 95 alternator plug is wired. 94 is probably the same.
http://forums.corvetteforum.com/1578395177-post8.html
http://forums.corvetteforum.com/1578395177-post8.html
Thread Starter
Instructor
Joined: Mar 1999
Posts: 219
Likes: 2
From: Gainesville Florida
Thanks for the help
OK, Just the info I needed. I checked the voltage output and I got lucky. I had a 50-50 chance of getting it right the first time and I got lucky. thanks for the replys.
