Troubleshooting 7-Way Wiring Missing a Wire on Random Axle Trailer With Brakes.
Question:
Wiring for random axle trailer with brakes on trailer. I have white black yellow green brown red. Basically white ground Black ? Red auxiliary Yellow left turn Green right turn Brown trailer lights All charts show a blue and a purple. But I have neither there is No purple or blue wire on my trailer. Please help
asked by: Bart W
Expert Reply:
7-way wiring colors can vary on a trailer. The # HM11141144 from your question follows the traditional SAE (See the diagram below) with red for the 12V power instead of black. The purple in this case would be the reverse lights. On the RV standard it would be yellow instead of purple. The only way for you to be sure which wires are which is to trace them back to see where they go.
With both a red and black wire, more than likely the black is 12V power and the red is the left turn/stop. Again, the only way to be sure is to see what they are attached to. One thing is for certain, you are missing a wire. The blue wire is the brake controller output. This will be necessary for your brake controller to activate your brakes. If you need to add this wire I recommend using the 10 Gauge Primary Wire - Blue - per Foot # 10-1-1
I have attached some helpful articles on trailer wiring for your reference.
Products Referenced in This Question
Product Page this Question was Asked From
Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector - Chevrolet/GMC
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 4 Flat
- 7 Round - Blade
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Trailer Hitch
- Shop: Redarc Tow-Pro Liberty Brake Controller - Dash Knob - 1 to 2 Axles - Proportional
- Shop: Trailer Wiring
- Shop: Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector - Chevrolet/GMC
- Shop: Towing Mirrors
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Vehicle Lights
- Article: REDARC Tow-Pro Liberty vs Tow-Pro Elite
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Hayes Energize III+ Trailer Brake Controller - 1 to 3 Axles - Proportional
- Q&A: Is There a Plug-In Adapter for Brake Controller on 2019 Chevy Colorado with Factory 7-Way
- Shop: K-Source Snap & Zap Custom Towing Mirrors - Snap On - Driver and Passenger Side
- Shop: Redarc Tow-Pro Elite Brake Controller - Dash Knob - 2 Braking Modes - 1 to 3 Axles - Proportional
- Video: Hopkins Multi-Tow Trailer Connector Installation - 2019 Chevrolet Colorado
- Video: Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - HM11141144 Review
- Q&A: Wire Color Chart Diagram for Installing Hopkins Multi-Tow 7-Way Blade and 4-Way # HM11141144
- Search Results: trailer emulator
- Q&A: Trouble Shooting Inoperable Electric Brakes on a 10K Trailer
- Q&A: 7-Way Tester Recommendation for 2016 Chevy Silverado 1500
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: brake controller
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Choosing the Right Trailer Wiring
- Search Results: hitch
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Choosing the Right Brake Controller
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
- Article: My Trailer Hitch Doesn't Fit