Finding the Brake Switch Wire to Install a Brake Controller on a 2014 Toyota Highlander
Question:
I know that you have 4 wires on controller, black=12v, white=ground, blue=back to electric brake on 7 pin plug, red=stop signal. What wire on the 2014 Highlander would you tap into for the red wire brake stop signal coming from the brake controller?
asked by: Colin
Helpful Expert Reply:
You have to test the brake switch wires with a circuit tester such as # PTW2991 to determine the correct wire for a brake controller red wire. You want the wire that only has power when the brake pedal is pressed and not with the headlights or turn signals on.
On a 2013 Highlander we installed a brake controller on, the brake switch wire was blue. I would start testing with the blue wire on the brake switch if applicable to your 2014.
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Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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