How to Determine the Correct Brake Signal Wire for a Brake Controller on a 2021 Ford Bronco
Question:
2008 Ford E350 Super Duty XLT. 12 passenger. W/o factory tow. 4 wire male plug, round, terminated at firewall by coolant reservoir, one wire 12v constant ignition off/on. One large blue wire no stripe. Is this wire electric brake circuit? No way to load pic here.
asked by: Dennis H
Expert Reply:
It could be, however there isn't going t be a way to determine if that's the correct wire based off of the color.
In order to find the correct brake signal wire behind the dash on your car, you're going to need to use a circuit tester like part # PTW2993.
Then you will need to press the brake pedal in and test each of the wires running to the brake pedal in order to determine which wire only illuminates when the pedal is pressed.
This will be the correct brake signal wire you will need to hook the brake controller to.
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