How to Activate Trailer 12V Circuit on 7-Way on 2014 GMC Yukon XL
Question:
I have 2014 gmc yukon. I have connected red wire from bundle and the 40 amp fuse was already in block.. Still no power to the rear of vehicle 1 oclock tab. Help me please
asked by: Brian
Expert Reply:
On your 2014 GMC Yukon XL there are two wires under the hood that have to be connected to make the tow package functional, one is the power wire to the brake control and the other is the battery charge line to the 7 way connector. This is the wire that feeds the 7-way circuit on the pin at the 1-o-clock position as you view the socket.
These wires are both Red/Black with eyelets on them. They are coiled up under the hood and will need to be connected to the under hood fuse box. One of the wires is located between the under hood fuse box and the left (driver) side fender. The other is located under the master cylinder/brake booster assembly.
The battery charge wire and the power wire to the brake control have different size eyelets on them and will connect to the threaded studs under the Gray handle at the front of the fuse box. The two studs are also different size. Please refer to the linked article which includes a photo of the two studs.
Product Page this Question was Asked From
Adapter 4-Pole to 7-Pole and 4-Pole
- Trailer Wiring
- Wiring Adapters
- Multi-Function Adapter
- 4 Flat
- Plug and Lead
- 4 Flat
- 7 Round - Blade
- Hopkins
more information >
Continue Researching
- Shop: Steel Mod Silver Trailer Wheel - 15" x 5" Rim - 5 on 4-3/4
- Search Results: cargo trailer vent
- Search Results: side wall vent
- Shop: Redline 2-Way Pop-Up Roof Vent with Garnish for Enclosed Trailers - Aluminum
- Shop: Redline 2-Way Pop-Up Roof Vent with Garnish for Enclosed Trailers - Steel
- Shop: Replacement Exterior Pop-Up Roof Vent - Steel - 13-1/2" x 8" - Black
- Article: Installing an Electric Brake Controller on 2007-2013 GM Full-Size Truck or 2007-Present GM SUV
- Q&A: Side Wall Vent Recommendation for an Enclosed Trailer for Maximum Air Flow
- Shop: Trailer Wiring
- Shop: Universal Wiring Adapter for Curt Trailer Brake Controllers
- Shop: Brake Controller
- Article: Brake Controller Installation for 2007 (New Body Style) - 2013 GMC Sierra and Chevy Silverado
- Shop: Replacement Screen Frame with Screen for Ventline Ventadome Manual Lift Roof Vents - Birch White
- Q&A: Troubleshooting Curt Brake Controller Installation in 2007 GMC Sierra New Body Style
- Shop: Vehicle Engine Heaters
- Shop: Kat's Heaters Custom Engine Block Heater - Frost Plug Style - 120V - 400 Watts - 28 mm
- Q&A: Activating 12-Volt Trailer Accessory Circuit on 7-way Trailer Connector of 2009 GMC Sierra
- Q&A: Activating 12 Volt Circuit on 7-Way Trailer Connector on a 2006 GMC Yukon XL Denali
- Q&A: What Size Nuts Are Needed to Connect Wires Under Hood for Brake Controller Installation on GMC Yukon
- Video: Review of CURT Electrical Tools - 7 Way Blade Vehicle End Tester - C66NR
- Q&A: The Function of the Auxiliary 12-Volt Connection on the 7-Way Trailer Connection
- Search Results: proportional controller
- Shop: Vehicle Lights
- Q&A: Tips for How to Identify a Trailer Axle
- Article: Trailer Wiring Diagrams
- Search Results: 90160
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Choosing the Right Trailer Wiring
- Search Results: lug nuts