How Does Wiring Get from Car Interior to Underhood Area for Brake Controller Install
Updated 01/12/2026 | Published 09/03/2024
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Question:
Hi there. I have had a difficult time trying to figure out how to install a brake controller on a 2014 Dodge Journey. Im not surw how to get the wires into the cab, and which wire i can splice into to connect the trailer brakes too. Do you have any instructions on this specific vehicle? Thank you!
asked by: Bryan M
Expert Reply:
Hey Bryan, so getting the wires from the cab of the vehicle into the underhood area is challenging but it comes down to finding a hole in the firewall and feeding the wires through that.
As far as splicing into vehicle wiring that comes down to finding the correct stoplight circuit for the red wire which you'll need to use a circuit tester like the part # PTW2993 to find a wire that runs to the stoplight switch that only has voltage when the brakes are applied. That is only circuit that gets wired to your vehicle's wiring.
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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
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Jameson C.
1/12/2026
Hey Bryan, how did things go getting the brake controller wired on your Dodge Journey? Were you able to find the stoplight circuit using the circuit tester? Sharing what worked could really help others tackling the same setup.