Brake Switch Wire Connection for Installing P-3 Brake Controller 90195 on a 2003 Toyota Tacoma

Question:

I have everything hooked up and wired according to your diagrams but having trouble finding cold side of brake switch dosent have tow package from factory needs to be hardwired please help. Mabey you know what color wire in the harness it is or wire harness chart that tells me what wire. Brake switch is mounted pretty far up into dash above the pedal...

asked by: Billy W

Expert Reply:

According to my research, the brake switch wire on a 2003 Toyota Tacoma should be green with a white tracer, but I would recommend testing to verify this is correct for your vehicle. Start at the brake pedal on the vehicle and test the wires running from it with a light tester like part # PTW2993. You will need to connect the red wire from the pigtail included with the Tekonsha P-3 brake controller # 90195 to the wire that shows power when you press the pedal but goes cold when you release the pedal.

You can see some additional information on the # 90195 brake controller at the links provided, including a video showing the same controller being installed on a 2009 model Tacoma which has a blue brake switch wire.

expert reply by: Sarah L