So, I'm working on installing my new HU, and suddenly the whole assembly loses power. OK, fair enough. I'm dinking with the wiring, I probably got a short somewhere. So, I pull out the new HU, pull out the wiring harness connecting the HU to the factory harness, hook the OEM HU to the factory harness, figure out which fuse blew (7.5 Amp ACC under the dash), replace it and-
it blows again.
OK, so, there is a short somewhere in the factory harness. The question is, where? Anyone know the best way to trace this without ripping the entire truck apart?