Hello,
I've been reading about 7-pin trailer wiring, and that is an "auxiliary" pin on them, and that it is now often used for backup lights. Does any know on a 2003 Dodge Ram 2500 if that is indeed for backup lights?
-Lint
For reference, what I read:
(COLORS MAY VARY) PIN COLOR GAUGE PURPOSE
1 white 10 common ground 2 blue 12 electric brake 3 green 14 tail/running lights 4 black 10 battery charge (+) 5 red 14 left turn/stop 6 brown 14 right turn/stop 7 yellow 14 auxiliary/back up