How to Find the Stop Light Wire to Install a Trailer Brake Controller on a 2008 Jeep Liberty
Question:
We have a 2008 jeep liberty with the tow package and I want to add a brake controller. I can find the red wire under the left kick area and I understand how to hook up all the wires except for the red wire from the controller which is supposed to attach to the cold side of the stop lamp switch. How do I find that wire in the bundle on the jeep? thanks
asked by: Al
Expert Reply:
Finding the correct wire on the brake switch for a brake controller red wire is pretty easy. You will need a circuit tester like # PTW2993 if you do not already have one. You will use the circuit tester to probe the wires on the brake switch. The wire you need will show a signal ONLY when the brake pedal is pressed and not at any other time.
If a wire also shows a signal when the head lamps are on or turn signals engaged it is not the correct wire. You need a dedicated brake light wire.
If you need a brake controller, I recommend the Tekonsha P2, # 90885. It is one of our best selling brake controllers because it is easy to set up and easy to use. I have included a link to the installation details for this brake controller as well as an FAQ article on brake controllers.
Products Referenced in This Question
Tekonsha Prodigy P2 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LED Display
- Up to 360 Degrees
- Tekonsha
more information >
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Q&A: Best Trailer Hitch Receiver and Wiring Harness For a 2012 Jeep Liberty
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: Correct Tow Wiring Harness for 2008 Jeep Liberty
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Flat Towing Package for 2008-2009 Jeep Liberty
- Q&A: Differences Between The Brake Buddy Select 3 And Brake Buddy Classic 3 Portable Braking Systems
- Q&A: Comparison of Wiring Harnesses to Fit 2011 Jeep Liberty and Other Parts Needed to Tow a Trailer
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Where is the Connection Point For Trailer Wiring Harness # 118384 on a 2011 Jeep Liberty
- Q&A: How Do You Determine If a 2006 Jeep Liberty Has the Tow Package Wiring?
- Article: Best Air Bag Suspension (2023)
- Article: How to Measure for Trailer Hitch Drop
- Article: Routing the Power Wire for a Trailer Wiring Harness
- Article: How to Clean Weld Nuts for the Installation of a Trailer Hitch | etrailer.com