So next was to install the GM aux fan harness I bought off Ebay, I am waiting on my electric fan setup and blackbear harness to show up for a permanent location of the aux relay but for now I mounted it up in front of the battery, sharing a bolt with a brace.
The harness is simple, 4 wires to connect up (sorry no pics of the harness, my wife had the camera when I was at that phase, I can help whoever decides to do this to there truck), but there is a ground wire that I attached to the bolt holding the relay, a red wire with a built in fusible link that I attached to the main power supply for the fuse block in the engine compartment (second pic), another red wire (no fusible link) that gives power to the fan from the relay, and a purple wire that goes to the switch to activate the relay.
I bought a Pilot brand switch with a LED in the tip that lets you know when the power is on to the fans so you don't leave it on all the time (can't hear the fan at all while in the car, just outside), all I did was make a bracket out of the same angle that I used for the crossbar extensions and piggy backed it on the side of my brake controller out of the way. For power for the switch light, there is a black box to the left of the brake pedal that I took the cover off of and found a power spade that only has power when the key is in the on position so that it will automatically turn off when I turn the truck off so that I don't forget and drain the battery. As for the ground, I just shared a ground with the alarm in my truck.
Pretty simple install, now I just need to do some testing and see if there is any benefit at all to having this fan!
Pm me if you have any questions at all!!
