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
Products Featured in This Question
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.
Product Page this Question was Asked From
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
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: duplex wire
- Q&A: Trailer Wiring for 2014 Lexus RX350 Without Factory Tow Package
- Article: Trailer Wiring Diagrams
- Article: Brake Controller Installation: Starting from Scratch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Wiring
- Shop: Brake Controller
- Shop: 7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: Manufacturer Discussion - Autowbrake Electric Brake Controller
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness - Dash Knob - Up to 2 Axles - Proportional
- Shop: 12 Gauge 2 Conductor Jacketed (Brake) Wire Per Foot
- Shop: Autowbrake Electric Brake Controller - Trailer Mount w/ Remote Fob - Up to 3 Axles - Proportional
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: Wiring Kit for 2, 4, 6, and 8 Brake Electric Trailer Brake Controllers
- Search Results: trailer wiring
- Shop: Trailer Hitch
- Video: How to Choose a Trailer Brake Controller
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer hitch
- Video: Clean Up Your Trailer Wiring
- Video: Curt Mounting Bracket for 4-Pole Flat Trailer Connector Review
- Search Results: trailer brake controller
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Recommended 4-Way Wiring for a 2017 Lexus RX 350 w/out the Tow Package and Where to Put the Ground
- Q&A: My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
- Search Results: brake controller
- Shop: Roof Rack
- Video: Feature Breakdown: Universal Installation Kit for Trailer Brake Controller
on Custom Fit Vehicle Wiring
