Thanks for reading,

It looks like I have a sick GM 3 wire alternator on my truck....Without the benefit of any documentation, which wires are which?

One terminal says "Bat" and the other two wires share a plactic connector on top of the alternator. What are they??

Thanks in advance.

Tommy

One is a + to the fields and the other one goes to the Guage. I just wired my + to the battery one and then it is a one wire set up (I don't have a guage)

Excellent, thanks!

http://www.chevelles.com/techref/tecref14.html

here's the general jist of it, i know this is on a camero, but i swaped the 4 wire alt. on an 81 k-5, but they have the wiring diagram for the 3 wire one