Troubleshooting 12v Power on 7-way Trailer Plug of 2003 GMC Sierra Not Working
Question:
.I have a 2003 GMC Sierra 1500 and my 7 pin doesn’t have 12 volt power so my new Curt Echo won’t power up. How can I get 12 volts to my connector? Thanks
asked by: Joe M
Expert Reply:
It sounds like this could be as simple as a missing fuse that activates the brake controller power or just a bad ground wire, but it does depend on whether or not this is a factory installed 7 way. I would start just by making sure that the ground wire is connected to a rust and debris free spot on the vehicle frame.
If the 7 way is the factory plug, then there's likely an issue along the power wire running from the battery to the 7 way, so you'll either need to run a new wire or trace the wiring on the plug to check for damage. Replace any damaged wiring you find.
If this plug was installed aftermarket, then you'll want to check to make sure that the fuse I mentioned above has been installed. The 30 amp fuse is installed in the power distribution box as shown in the photo I have edited. The power distribution box is located under the hood, on the drivers side on the fender well.
If that fuse is present or the wiring is completely in tact, let me know and I can give you a few other spots to check. I've also linked an FAQ article we put together specifically for a 1999-2006 GMC Sierra brake controller installation that you might find helpful.
Product Page this Question was Asked From
etrailer Rubber Hitch Cover for 2" Trailer Hitches - Qty 1
- Hitch Covers
- Misc Covers
- Plain
- Rubber
- Fits 2 Inch Hitch
- Standard
- Square
- etrailer
more information >
Continue Researching
- Shop: Trailer Hitch
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Brake Controller
- Video: Trailer Hitch Installation - 2003 GMC Sierra - Curt
- Shop: Curt Echo In-Line Bluetooth Brake Controller w/ OneControl App - 1 to 4 Axles - Proportional
- Shop: Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Shop: etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 10K
- Shop: etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 8K
- Shop: Dexter Electric Trailer Brakes - 10" - Left/Right Hand Assemblies - 3.5K
- Q&A: Do Electric Brakes Need to Share Ground Wire?
- Q&A: Should There Be Power on the Ground Wire for a Brake Magnet
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Search Results: c83hr
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Shop: Trailer Wiring
- Video: Curt Echo In-Line Wireless Brake Controller Installation - 2016 Chevrolet Silverado 1500
- Q&A: Where Do the Red and Blue Wires Connect Under the Hood on a 2003 Chevy Silverado
- Article: Trailer Wiring Diagrams
- Article: Brake Controller Installation: Starting from Scratch
- Video: Dexter Axle Predator Electric Brake Controller Installation - 2012 Chevrolet Silverado
- Q&A: How to Install a Brake Controller in a 2003 Chevy Silverado 2500
- Shop: Vehicle Tow Bar Wiring
- Q&A: Curt Echo Brake Controller Will Not Pair To Phone With Working Bluetooth Connection
- Q&A: No 12 Volt Power Reaching Trailer Connector on 2003 Chevrolet Silverado 2500HD
- Video: Trailer Brake Controller Installation - 1993 Chevrolet Suburban
- Video: Review of etrailer - Brake Controller - ETBC7
- Q&A: Which Wire From Breakaway Switch Does Blue Wire from Hopkins Charger # 20011 Connect To
- Video: Curt T-Connector Vehicle Wiring Harness Review C55384
- Video: Pollak 7-Pole, RV-Style Trailer Wiring Harness Installation - 2000 Chevrolet Silverado
- Shop: Bumpers