Troubleshooting Fuses and Relays for 12V Power on 7-Way Trailer Connector of 2008 Ford F-450
Products Featured in This Question
Question:
I have a 2008 Ford F4 50 I have no power to the 12 V wire on my plug in the rear of the truck I do not have the owners manual I don’t know where the fuse is for that I appreciate any help you can give me thank you
asked by: Loren J
Helpful Expert Reply:
I looked up your owners manual in a web search and was able to find that fuse 33 in the fuse box in the passenger side of your cab is one place to check. Relay 44 and relay 56 in the engine bay power distribution box also impact that 12v Power at your trailer connector.
With relays testing isn't easy so simply replacing them with one you know works is the best option. Then you can use a circuit tester like # PTW2993 to test your 7-way at the 1 o'clock position for power.
Product Page this Question was Asked From
Curt 7-Way to RV Socket LED Circuit Tester - Vehicle End
- Electrical Tools
- Testers
- Circuit Tester
- Tow Function Tester
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Brake Controller
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Shop: 2-5/16" Hitch Ball - 1-1/4" Diameter x 2-3/4" Long Shank - Chrome - 20,000 lbs
- Shop: Cam-Action Lockable Door Latch Kit w/ Wide Hasp for Small Enclosed Trailers - Zinc-Plated Steel
- Video: Trailer Wiring Harness Installation - 2006 Ford F-350 HM40975
- Shop: Tekonsha Voyager iD Brake Controller w/ Custom Harness - Dash Knob - Up to 3 Axles - Proportional
- Q&A: What is the Difference Between the Tekonsha Prodigy P2 and the P3 Brake Controllers
- Shop: Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector
- Shop: Tonneau Cover
- Search Results: 37185
- Search Results: 118247
- Video: How to Set Up Your Adapter 4-Pole to 7-Pole and 4-Pole on a 2011 Ford F-150
- Video: DIY Install: Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector on your 2004 Ford F-150
- Shop: Replacement Custom Multi-Tow 7-Way and 4-Way Trailer Connectors
- Shop: Ford Replacement OEM Tow Package Wiring Harness, 7-Way
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Video: Finding the Right Trailer Wiring Harness
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Video: How to Choose a Trailer Brake Controller
- Article: Trailer Wiring Diagrams
- Shop: Suspension Enhancement
- 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)
- Search Results: trailer brake controller
- Q&A: Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch
- Article: Brake Controller Installation: Starting from Scratch
on Wiring
