Hey thanks for the reply, I'm just trying not to wire this alt wrong and fry something!! I have a friend with a '88 Supra that I'm gonna take a voltmeter to and find what wire does what, then splice them in accordingly. I just want to know what these wires do so I feel more edjumacated!! <img src="/forums/images/graemlins/lol.gif" alt="" /> The wiring for this swap is starting to make some sense now that I'm elbow deep in it!! Anyone know of a site that describes the IH1 and IH2 pinouts for a 1994 Pickup? After reading through the swap threads online I've matched up just about all the wires needed for the swap, but there are still quite a few wires on IH1 and a couple on IH2 not accounted for. I'm assuming these wires serve a purpose and I'd like to make sure I'm not missing something there. Thanks a bunch <img src="/forums/images/graemlins/kewl.gif" alt="" />