Another magnum swap thread

What I did on my OBD1 harness in my Scamp was got on Alldata and found the pinout for the 60 pin plug for the ECM. Then un-taped all the wiring and started seeing what wasn't needed. Your harness will have things like headlight wiring in it, which obviously you don't need. I got it stripped down to just 2 or 3 relays and fuses in the underhood fuse box (for fuel pump and A/C). Once it's all done I ended up with two power wires that actually connected the harness to the car(and a couple grounds that were in the harness) power for the computer and power to the fuel pump.

I just did the same thing on an OBD2 harness last month. It would have ended up being just 2 power wires again, but at some point I accidentally removed the power to my relays in the underhood fuse box, so I just added that wire to my computer power wire. I tested the harness and started a 5.2/auto that is setting on my garage floor!