Originally Posted by Stump Jumper
I have all of the wires connected except the brake light wire because I can't figure out where to connect it on the 7 pin. Ideas? Thanks.
A standard 7-blade RV-type connector doesn't have a separate brake light wire. Like the 4-pin connector, the brake lights are a function of the left and right turn signal leads. The 3 additional wires over and above those listed for the 4-pin connector are:
1. Trailer BRAKES - this is not a brake light wire, but actuates the brakes on the trailer through a trailer brake controller (if installed) on the tow vehicle
2. Battery +12VDC - this charges the trailer battery that powers the trailer brakes in case of a breakaway situation
3. Auxiliary - the large round center pin, generally used for backup lamps if the trailer is so equipped.
2016 Ram Longhorn 3500 Dually 4x4 CCLB, 385/900 Cummins, Aisin AS69RC, 4.10
2014.5 DRV Mobile Suites 38RSSA #6972
Come join us on a TEXAS BOOMERS