After not getting a harness for the electric brake with my new truck, and the dealer wanting me to pay for it (long story) I finally purchased one on ebay. I thought I found the wiring just behind the dash, a blue connector but it was square and had 5 wires. Anyone know what its for? So I start looking again. Can't find it. Get back on this forum and do search. After reading a few threads I finally found it behind the emegency brake lying against the firewall. I had to move the white junction box full of wires and there it was behind it. Now i'm ready to do some camping.