Trailer Running Lamp Fuse Location on 2003 Chevy Suburban
Question:
The trailering running lights on my boat trailer are not working, although the brake and signal lights work fine. I have tested it is not a problem on the boat trailer. There is no power on the seven-pin connector for the trailer lights. Do you know exactly which fuse on a 2003 Chevrolet Suburban 1500 would control the trailering running lights? I identified in the owners manual the fuses for brakes and turn signals, but I could not determine exactly which one applies to the trailering lights. Thank you
asked by: Robert F
Helpful Expert Reply:
I'd be happy to help you with that. Your Suburban has 3 different fuse panels, one in the center console, one in the drivers side of the dash where it abuts the inside of the driver's side door and one in the engine compartment. You'll find the trailer taillight fuse in the fuse panel in the engine compartment. GM doesn't number the location, but the circuit is described as 'TRL PARK', and is shown in the diagram I provided.
You'll also want to find what caused that fuse to blow in the first place. Typically, this is caused by a short in the trailer wiring, specifically the running lamp circuit in your case. I'd recommend closely examining the trailer running lamp circuit and locating and repairing the short before plugging the trailer in after the fuse is replaced, otherwise you'll continue blowing fuses. Trace the running lamp circuit from the trailer connector back to the lamps, looking for loose connections or cracked or worn wire insulation. Pay special attention to pinch points or locations where the wire runs through a hole in the frame as these are likely wear points.
Product Page this Question was Asked From
Pollak Replacement 7-Pole, RV-Style Trailer Connector 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
- Q&A: Should Fuse or Circuit Breaker Be Used When Installing Trailer Brake Controller
- Shop: Timbren Rear Suspension Enhancement System
- Article: Brake Controller Installation: Starting from Scratch
- Q&A: What is the Proper Gauge Wire for Installation of a Brake Controller and Trailer Brakes
- Shop: Trailer Wiring
- Search Results: trailer tires and wheels
- Shop: Ceiling Garnish for Ventline Roof Vent - 5-5/16" Leg - 14-1/4" x 14-1/4" - White
- Search Results: trailer studs
- Shop: Kenda Karrier ST175/80R13 Radial Trailer Tire with 13" Black Mod Wheel - 5 on 4-1/2 - LR D
- Shop: Dexstar Steel Mini Mod Trailer Wheel - 13" x 4-1/2" Rim - 4 on 4 - Black
- Shop: Dexstar Steel Mini Mod Trailer Wheel - 13" x 4-1/2" Rim - 5 on 4-1/2 - Black
- Shop: Vesper Steel Modular Trailer Wheel - 13" x 4-1/2" Rim - 5 on 4-1/2 - Silver
- Shop: Dexstar Steel Mini Mod Trailer Wheel - 12" x 4" Rim - 4 on 4 - White Powder Coat
- Shop: Roof Rack
- Q&A: Trailer Left Turn Signal Pin has No Power on a 2003 Chevy Silverado or GMC Sierra Diesel
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Article: Trailer Wiring Diagrams
- Shop: Vehicle Lights
- Shop: BOLT brand vehicle and hitch locks
- Q&A: Location to Install Brake Controller Power Fuse on 2003 GMC Sierra
- Search Results: square led tail lights
- Search Results: 6" oval tail light
- Search Results: trailer lights
- Q&A: Fuse Location for Trailer Brake Controller on a 2005 Chevy Silverado 1500
- Q&A: Trailer Turn Signals Both Blink when Just Left Turn Signal is Activated
- Shop: Brake Controller
- Video: Trailer Wiring Harness Installation - 2003 Chevrolet Silverado
- Video: Install: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket on a 2003 Chevrolet Silverado
- Video: Pollak 7-Way to RV Socket LED Circuit Tester Spec Review
- Search Results: trailer light tester
Robert F.
3/30/2020
Mikes answer solved the immediate problem! Replacing the fuse made the difference. Now I have to figure out what caused the fuse to burn out.Thank you very much!