Activating 12-Volt Accessory Circuit to 7-Way on 2004 Chevy Silverado 2500
Question:
Where is the connection on the truck to provide the auxillary power to charge my trailer battery? I have the seven flat blade rv style plug.
asked by: Ed
Expert Reply:
The pin in the 1:00 position on your 7-way is fed by the auxiliary power circuit. The wire feeding that circuit runs to the engine compartment and terminates under the brake booster and master cylinder and will have a ring terminal on the end of it. The ring terminal will connect to the front power post on the fuse box under the hood. A 40 amp fuse will need to be installed in the location closest to the power post to activate the circuit.
I have edited a photo for you showing the fuse box and the fuse and wire connection location. I have also linked you to some FAQ articles that you might find helpful.

Product Page this Question was Asked From
Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 7 Round - Blade
- Pollak
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Video: CE Smith Roller-Style Guide-Ons for Boat Trailers Review
- Search Results: tow and stow
- Shop: Trailer Hub and Drum Assembly - 4,400-lb E-Z Lube Axles - 10" Diameter - 6 on 5-1/2
- Shop: Brophy Stake Pocket Tie Down Anchor - Black Powder Coat - 2-5/16" D-Ring - 4,000 lbs
- Q&A: Fuse Location for 12-Volt Accessory Feed to 7-Way Trailer Connector on 2005 Chevy Silverado
- Shop: Tandem Axle Teardrop Trailer Fenders for Enclosed Trailers - 14" to 15" Wheels - Qty 2
- Shop: Tandem Axle Trailer Fenders for Enclosed Trailers - Aluminum - 14" to 15" Wheels - Qty 2
- Shop: Optronics FLEET Count LED Backup Light for Truck or Trailer - Submersible - 6 Diodes - Clear Lens
- Shop: Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Clear Lens
- Search Results: brake controller
- Search Results: bul12cfb
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Shop: Straight Equalizer for 1-3/4" Wide Double-Eye Springs - 8" Long - 3/4" Center Hole
- Search Results: e~track straps
- Video: Hands-On with the Optronics FLEET Count LED Backup Light for Truck or Trailer
- Search Results: skylight
- Search Results: 14~67
- Search Results: 14~111
- Article: Best Ladder Racks
- Video: All About the Backing Plate for Tandem Axle Trailer Fender
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Q&A: Troubleshooting No Power At The Factory Trailer Plug
- Q&A: Troubleshooting Interior Lights Not Working for Enclosed Trailer
- Q&A: Stainless Steel Trailer Hitch Lock Made in the USA
- Q&A: What is Difference Between Pollak Metal 7-way and Roadmaster
- Article: Trailer Wiring Diagrams
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is a Complete Flat Tow Set-Up For My 2022 Ram 1500 Bighorn 4x4 Tow Behind 2013 Entegra Aspire?
- Q&A: How to Adapt a 7-Way Round Connector to a 7-Way Flat