Help needed 08 GMC 1500 mm2 wiring
I have a 08 hmc 1500, just bought a nice condition 7'6" sd 3 plug setup and the 3 port isolation module and all wiring.
I have run all wiring, mounted the module, connected all wires, so on.
I have no power to the joystick, and my passenger side high beam headlight on the truck will not function.
I've put the keyed power wire in 4 different spots, all of which have power with key on. Checked all grounds, checked and rechecked tapped connections to running lights and turn signals, still nothing.
There is a black wire off one of the 2 relays in the harness, I had no idea where it went but assumed it needed ground, grounded to battery and still nothing.
Does anyone out there have any photos of their setup, I need to look at another one or have someone tell me what I am missing here. Going crazy. Thanks in advance.