Curt C55242 - What Are The Fuses And Relays For?
Updated 08/07/2025 | Published 07/06/2025
Question:
122891154 1997 Ford F-250 I dont know where to install the smaller relay. From Ford the large relay and two fuses were already installed. The little relay is a mystery and my electric breaks are no working. Please help
asked by: Dave H
Expert Reply:
Hey Dave, thanks for reaching out. The two relays that come with the Curt # C55242 are for the trailer tow backup lamp and the trailer tow battery charge. The two included fuses are for the trailer tow electric brake and battery charge. You will need to consult your owners manual for fuse and relay locations but I recommend removing the current fuses and replacing them with the new ones that came with your wiring kit. That should allow everything to work normally. If not, something else is wrong.
Dave H.
8/7/2025
No but I was able configure it with my old tablet computer linked to WiFi
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 7 Blade
- Plug and Lead
- Plug-In
- Visible
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Search Results: trailer brakes
- Search Results: trailer brake controller
- Shop: Trailer Wiring
- Shop: Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Shop: Brake Controller
- Shop: Kenda Karrier KR53 ST205/75R14 Radial Trailer Tire with 14" Silver Mod Wheel - 5 on 4-1/2
- Shop: Loadstar ST205/75D14 Bias Trailer Tire with 14" White Wheel - 5 on 4-1/2 - Load Range C
- Shop: WFCO Auto Detect RV Converter and AC/DC Distribution Panel - 12V - 25 Amp
- Shop: Thomas Payne RV Jackknife Sofa w/ Hinges, Hardware - Fold Down - 70" Long - Great Lakes Grotto
- Shop: Thomas Payne Euro RV Recliner Chair w/ Footrest - 20" Seat Width - McCoy
- Video: How to Choose a Trailer Brake Controller
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Redarc Tow-Pro Liberty Brake Controller Review RED24FR
- Search Results: trailer wiring
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Search Results: trailer tires and wheels
- Shop: Suspension Enhancement
- Video: Feature Breakdown: Universal Installation Kit for Trailer Brake Controller
- Article: How to Measure for Trailer Hitch Drop
- Search Results: brake controller
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Search Results: trailer jack
- Article: Brake Controller Installation: Starting from Scratch
on Custom Fit Vehicle Wiring
Jesse M.
8/7/2025
Hey Dave, did replacing the fuses with the ones from your wiring kit help get your electric brakes working? I'm curious to know how it turned out, as it might help others facing a similar issue.