Trailer Electric Brake Wiring Troubleshooting on 2015 GMC Sierra 3500
Question:
Where is the trailer brake relay located on a 2015 gmc sierra 3500
asked by: Katie P
0
Expert Reply:
In the Engine compartment on the driver's side, there is a fuse block. In the #1 location there is a micro J-case fuse for the Trailer Brake. There is not a relay for this on your 2015 GMC Sierra 3500. Your owners manual does have a relay on the driver's side of the vehicle, next to the under hood electrical container that is used to supply power to additional equipment. This isn't specified as being part of the trailer brake system. This is stated in the online owners manual on page 9-88.
You can use a circuit tester like # PTW2993 to test wiring functions and pin locations.
expert reply by:
Jason S
0

Product Page this Question was Asked From
Continue Researching
- Shop: Unitized Oil Seal
- Shop: etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 12K
- Article: Trailer Wiring Diagrams
- Shop: Trailer Wiring
- Video: Trailer Brake Controller Wire Testing
- Q&A: How to Test Brake Controller without Trailer Connected
- Article: Testing Trailer Brake Magnets for Proper Function
- Search Results: trailer wiring
- Shop: Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 9K to 10K
- Shop: Brake Mounting Bolt for 10K, 12K & 15K Brakes
- Shop: Mounting Bolts and Hardware for 12-1/4" Brake Assemblies - 10,000 lbs to 15,000 lbs
- Shop: etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 10K
- Shop: Brake Mount Locking Nut for 10K, 12K & 15K Brakes
- Search Results: dexter 10k brakes
- Q&A: Trailer Brakes are Very Weak Even After Adjusting Them
- Q&A: Do Nev-R-Adjust Brakes Need any Manual Adjustment
- Search Results: brakeaway switch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Finding the Right Trailer Wiring Harness
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Video: Curt Powered Tail Light Converter Installation - 2023 Kia Telluride
- Shop: Brake Controller
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Search Results: trailer brakes
- Shop: Gooseneck Hitch
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Fifth Wheel Hitch