Troubleshooting Brake Controller on 2002 GMC Sierra 2500 HD
Question:
The electronic controller in my 2002 GMC HD 2500 truck stopped working. I tested the voltage sent to the controller and no juice goes through when the brake is pushed. I replaced the switch for the tailights. Is there a specific fuse for the brake controller or a relay? I have gone through the fuse box and cannot seem to find it.
asked by: Rob
Expert Reply:
First, use a circuit tester like part # PTW2993 on the black wire exiting the rear of the controller to verify that power is reaching it. If not, there is a 20- or 30-amp fuse in the power distribution box, located under the hood on the driver's side fender, that is most likely blown. Once the fuse is replaced, you will want to inspect the brake output circuit on the trailer connector, tracing it back to the trailer brake magnets to determine what caused the fuse to let go. Skipping this step will probably mean you will keep blowing fuses.
Will the controller actuate the brakes when the manual override switch is activated? If the brakes work with the switch, but not the brake pedal, there is a different fuse involved. Check your owner's manual for the location of the CHMSL fuse, and check and replace if needed.
You can see additional photos at the links provided.
Products Referenced in This Question
Product Page this Question was Asked From
Tekonsha Custom Wiring Adapter for Trailer Brake Controllers - Pigtail - GM
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Wired to Brake Controller
- Vehicle Specific
- Tekonsha
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: T-Handle Locking Stainless Steel Flush Door Latch
- Search Results: toolbox latches
- Video: Redline Enclosed Trailer Parts - Doors - L4080 Review
- Shop: Rack'Em Spare Tire Mount for E Track
- Q&A: Troubleshooting the Comp Freeze Error Code on Air Lift Compressor Remote
- Shop: Drop Leg for etrailer and Ram Jacks - 13-1/4" Tall - 5-1/4" Diameter Footplate - Zinc
- Search Results: tongue mount bike rack
- Shop: LumenX LED Trailer Tail Light w/ Grommet and Plug - 4 Function - 7 Diodes - Oval - Red/Clear Lens
- Shop: Hopkins Endurance Multi-Tow Trailer Connector Adapter - 7-Way to 6-Way, 5-Way or 4-Way
- Shop: Hopkins Multi-Tow Trailer Connector Adapter - 7-Way to 5-Wire Flat/4-Wire Flat and 12-V Power Socket
- Shop: Replacement Pipe for etrailer and Ram Pipe Mount Swivel Jacks - 2-1/2" - 5/8" Pin Hole
- Search Results: spare tire carrier
- Article: Trailer Tire Sizing
- Shop: Trailer Hitch
- Video: RackEm Spare Tire Carrier Review
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: spare tire mount
- Article: Trailer Wiring Diagrams
- Shop: Trailer Wiring
- Video: CargoSmart Spare Tire Holder Review
- Shop: Suspension Enhancement
- Video: Rackem Spare Tire Rack Review
- Search Results: etrack
- Article: How to Install E-Track in 3 Easy Steps
- Search Results: spare tire bracket
- Video: etrailer Horizontal E-Track Review
- Shop: Brake Controller
- Shop: Gooseneck Hitch
- Video: Interaction with E-Track
- Search Results: e~track
on Accessories and Parts
