Finding the Stop Light Wire on the Brake Switch to Install a Brake Controller on 1999 Toyota Tacoma
Updated 06/15/2010 | Published 06/12/2010
Question:
How do I find out which wire is 12v on the brake switch to connect the red wire to. For a 1999 Toyota Tacoma
asked by: Curtis
Expert Reply:
When installing a brake controller like the Tekonsha P2, # 90885, you will need to use a circuit tester like # PTW2993 to find the stop light wire on the brake switch above the brake pedal.
You will probe the wires until you find the one that carriers a signal ONLY when the brake pedal is pressed. It will not carry a signal at any other time. Once you find this wire, connect it to the red wire on the brake controller.
I have included a link to an FAQ article below that discusses the brake controller installation process in greater detail.
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