Depending where you cut the harnice you get three or four wires. The ground splits about 2 feet into the harnice. I used one of the blower drive support bolts as a ground for the fan. The other two larger wires with a red tracer are high and low speed. I just ran two relays, both wired with a 12# wire that goes back to thru the wire trace at the back of the engine compartment. I first put the two wires in a wire wrap and then fished that thru the trace. You can see about 3" of this in the one photo in the very top right corner of the shot. The main wire harnice is also in there. The other end of those two wires connect thru inline fuses to the bottom terminal of the starter relay. Caution the starter relay is a 5/16 course thread, not metric Most of the connectors should be the heat shrink type for dependability. Start to finish, I was done in about 4 hours including the trips to the autoparts stores for small parts.

Hope this helps

Andy