The holiday rambler doesn't have the 7 pin. It has its own 5 Pin rectangular connector under the chassis which then goes to the actual trailer plug where its converted from 5 pin to the usual 4 pin. Or thats how it was. I was testing it all wrong, i went and picked up a test light and the wire that was labeled as reverse in fact was triggered by reserve only. Got everything re wired and cleaned up nicely under there and it works and looks great now :) The 5 pin wires on the holiday rambler are as following: BRN(marker), GRN(right turn/brake), GRY(backup), YEL(left turn/brake), WHT(ground) so i just pulled off the Gray(reverse) and White(ground) and walla