How to Identify The Correct Wire To Tie In The Brake Controller On a 2015 Lexus RX 350
Updated 06/19/2021 | Published 06/18/2021
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Question:
How do I test which wire of the five on a 2015 lexus rx350 to tie into? One is yellow, one brown, one black, and 2 white, should i disconect the connection, the wire are very small, thanks.
asked by: Jim H
Helpful Expert Reply:
A Hook Probe Circuit Tester # PTW2993 is needed to be able to test the wires coming out of the brake switch on your 2015 Lexus RX350. You will need to test the wires that you have until you are able to find the wire that has no power with the brake pedal released, but gets power when you push on the brake pedal. You will not be able to test this with the connector removed from the brake switch as the circuit needs to be complete. When we did this installation on a 2013 RX 350, which I have linked below it was the yellow wire that we spliced into.
With the correct wire identified you will be able wire in a Tekonsha Prodigy P3 Trailer Brake Controller # 90195 with a Wire Splice # SWC502905-1 or the preferred method would be to solder into the wiring for a more durable connection.
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Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- 7 Round
- Plug Only
- Pollak
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