How to Identify Correct Brake Light Switch Wire for Brake Controller Installation in 2017 Pacifica
Question:
I have purchased everything listed by you for my 2017 Chrysler Pacifica and need some guidance on the location and description of this cold side brake wire Can you please help?
asked by: Carl S
Expert Reply:
The cold side of a brake light switch is used as the trigger signal to activate a trailer brake controller like the Prodigy P2 # 90885. The controller installation kit you purchased, part # ETBC7, includes a probe-style circuit tester that allows you to determine which of the wires at the brake light switch is connected the to cold side of the switch. The correct vehicle wire to connect to the RED wire on the controller is the one that goes hot ONLY when the brake pedal is pressed, and at no other time or with any other function engaged.
Auto makers can change the color of wiring used pretty much at any time and without notice (they don't shut down the production line if they run out of one wire color - they use a different one) so testing with the circuit tester is the best route to find the correct signal wire. The other leads are ground (white wire) which connects to the battery negative terminal; output (blue wire) that connects to the 7-way; and 12V power to the controller (black wire) which connects to the battery + terminal through a circuit breaker.
I have linked both an article and video covering installation of the # ETBC7 kit.
![Adam R](https://images.etrailer.com/static/images/catg/people/477_tn.jpg)
Products Referenced in This Question
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
Product Page this Question was Asked From
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 >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Reese Friction Sway Control Kit - Economy - by Draw-Tite, Reese and Hidden Hitch
- Video: Reese Friction Sway Control Kit Review
- Video: Review of Reese Weight Distribution - Friction Sway Bar - 83660
- Video: Reese Weight Distribution RP26003 Review
- Video: Reese Sway-Control Bracket Review
- Shop: Replacement Ball for Curt Friction Sway Control System
- Shop: Reese Sway-Control Bracket for 2" Ball Mounts - Class III and IV
- Shop: Vehicle Tow Bar Brake System
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Brake Controller
- Article: Brake Controller Installation: Starting from Scratch
- Shop: Trailer Wiring
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Roadmaster Universal Stop Light Switch Kit
- Q&A: How to Find COLD Side of Brake Light Switch for Hardwiring Brake Controller
- Q&A: Brake Controller and Wiring Recommendation for 2019 Subaru Outback
- Q&A: Where is Cold Side of Brake Switch Normally Found
- Q&A: Recommend Trailer Hitch and Brake Controller To Tow 3400 lb. 21 Ft Trailer w/ 2010 Dodge Nitro
- Search Results: curt 56040
- Search Results: tk63vr
- Search Results: trailer wiring
- Shop: 35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Video: Roadmaster Universal Stop Light Switch Kit Instalaltion - 2021 Chevrolet Trailblazer
- Q&A: Can a Unibody Vehicle Use Weight Distribution or Sway Control?
- Q&A: How to Find Stoplight Circuit for Installing Brake Controller on a Dodge Journey
- Q&A: Solution for Connecting to Cold Side of Brake Switch on 2019 Subaru Outback
- Search Results: friction sway bar
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: roadmaster stop light switch
- Search Results: anti~sway bar anti~sway bars