Searched the forums for this and didn't find quite the right info, so hopefully someone out there can help with an issue I'm having trying to install a backup camera on my '05 HL Base, V6, AWD. I'm putting in a backup camera (new driver in the family) and wanted to tap into power at the reverse bulb for the camera. Found info online indicating pink wire is +12V and white/black is ground (although I was planning to ground to the chassis). Believing in "trust but verify), I opened the tail light access panel on the driver's side and went to measure voltage at the pink wire to make sure I had the right one. Found no voltage at any wire. Suspected that I somehow shorted the connection so I checked fuses and sure enough found the IGN1 7.5A fuse blown. Replaced checked again, same result. I checked continuity between the electrical connector pins and the light socket and determined that the pink and white/black wires are the ones connected to the bulb, so I tend to believe the power and ground wires are indeed correct. But, activating turn signals or backup lights with the socket removed from the tail light assembly or while checking for +12V against a chassis ground blows IGN1 every time. Any idea what's going on with this? My HL does have the towing prep package and a 4 wire flat trailer harness connected, if that makes any difference.