On a similar note>
I have a trailer with surge brakes. Instead of the typical
4 wire harness of gnd, lb, rb, brk....I have on the boat
a 5 wire harness. The extra wire is a back-up light wire, which allows for the surge brakes to disconnect when the AV and boat in tow are going in reverse.
My '95 Tahoe had the extra wire taped up in the wire harness and all I had to do was go buy a 5 wire plug
and hook it up, which then mated to the boat fine.
Since, the plug that was in the center console is only a 4 wire...has anyone been to the dealer for a 5 wire plug
or done something else to incorporate that back-up light wire into their existing 4 wire plug?