What are the Wire Functions on the Factory Brake Controller Plug in a 2012 Ram 1500
Updated 06/18/2015 | Published 06/17/2015
Question:
I need to install my brake controller and no one sells my harness adapter locally for my 2012 ram 1500 st 4x4 5.7 hemi. My problem is I need it wired tomorrow.. Any info on wire colors going to that factory plug.. Like what colors are what function do I can just hard wire it?
asked by: Chris E
Expert Reply:
So, by looking at your picture and comparing it to harness # 3021-P for a 2012 Ram 1500 it looks like the pink /white wire is ground, green/black is 12-volt power in, yellow/red is output to the trailer brakes, and green is input from the brake switch.
You can test this using a circuit tester such as # PTW2993. A wire that has 12-volt power all the time goes to the brake controller black wire. A wire that only has power when the brake pedal is pressed goes to the brake controller red wire.
You could run 12-volt power backwards using a 12-volt battery and wire and apply power to the brake output pin on the 7-Way (5 o'clock position) and then test the remaining two wires in the plug to see which is output to the trailer brakes and which is ground.
