Troubleshooting Lack of Trailer Brake Power at 7-Way Trailer Connector
Question:
2011 yukon xl No power on trailer brake terminal at bumper, all trailer lights work
asked by: Jim
Expert Reply:
If you have no power on the brake controller output terminal of your 7-way (which is the 5 o'clock pin) then you most likely have a short in your wire or a bad brake controller. I recommend starting your troubleshooting using a circuit tester like # PTW2993 on that pin. If when you hit the manual override on your brake controller, you get no power as you increase the output with the manual override then I recommend next checking directly behind that connector which is normally a blue wire. If you still don't have power there, next your will check directly behind your brake controller. Again, this is normally a blue wire. If you have no power in that location when using that manual override, then your brake controller is the issue.
If you have power behind the controller, then I recommend running a new wire to your trailer connector using # 10-1-1 sold by the foot.
If you are just installing a brake controller, then there are connections under the hood that need to be made. I've attached an article to assist.
Products Referenced in This Question
Product Page this Question was Asked From
Twist-in, 7-Pole, RV-Style Trailer Connector for Chevy and GMC Vehicles - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- Pollak
more information >
Continue Researching
- Article: Trailer Wiring Diagrams
- Shop: Brake Controller
- Shop: Trailer Wiring
- Shop: Suspension Enhancement
- Video: Derale Series 8000 Transmission Cooler Review
- Shop: Transmission Cooler
- Shop: Flex-a-lite Transmission Cooler - Plate and Fin - 17 Row - Barbed Fitting
- Shop: Air Lift 1000 Air Helper Springs for Coil Springs - Rear
- Search Results: trailer wiring harness
- Shop: Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard
- Q&A: No Power On Blue Wire to Trailer Brakes from Brake Controller
- Q&A: Troubleshooting 7-Way Installation that Has No Right Turn or Stop Lights on Trailer
- Q&A: Weak Voltage At Brake Output Circuit On 7-Way Plug
- Shop: Hook Probe Circuit Tester
- Article: Troubleshooting Brake Controller Installations
- Video: Trailer Brake Controller Wire Testing
- Shop: Trailer Hitch
- Q&A: 7-Way RV Trailer Connector Wiring Diagram
- Q&A: Recommended Trailer Wiring for 7-Way Trailer Connection on 2017 Subaru Crosstrek
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Q&A: Troubleshooting Trailer Brakes After Installing a New 7-Way Trailer Connector
- Q&A: Troubleshooting No Power on the Blue Brake Output Wire from a Brake Controller
- Shop: Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Reese Pro Round Bar Weight Distribution w Sway Control - Round Bar - 8,000 lbs GTW, 800 lbs TW
- Search Results: 6 way plug to 7 way
- Video: etrailer Electric Jack with Footplate and 7-Way Plug Review
- Video: Review of Hopkins Car Organizer - Pop Up Trash Can 7 Inch Tall - HM72613
- Article: Installing an Electric Brake Controller on 2007-2013 GM Full-Size Truck or 2007-Present GM SUV
- Article: Testing Brake Controls
- Video: Review of Marlboro Trailer Door Hinges - Barrel Hinge - MA85VR