No 12 Volt Power on 7-Way Trailer Connector on a 2010 Ford F-350
Question:
what to check next?
asked by: John
Expert Reply:
Relays are difficult to check. Really the only way to do it is to get a relay you know works and try it. If that does not work, it is possible that there is another fuse or relay associated with the 12-volt circuit. Using the owner's manual and/or legend on fuse box lid you can determine if there is another to check.
If your truck only came with a 4-Way wiring harness initially then the wire for 12-volt power is probably not run back to the connector. Trace the cord back from the trailer connector towards the front of the vehicle where it plugs into another harness. Use a circuit tester, # PTW2993 if you need one, to test the pins on the forward side of the connector. If the 12-volt power is not getting to that point then there is a wiring issue, broke or loose connection you will need to track down.
If there is power getting to that point then there is something wrong between that connection and the trailer connector that you will need to pin point and fix. You can test for this by testing along the 12 volt power wire from point A to point B every so often. Once you find a dead spot you will be close to the issue if it is in the wiring.
Products Referenced in This Question
Product Page this Question was Asked From
Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty)
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- Tow Ready
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Suspension Enhancement
- Shop: Trailer Wiring
- Shop: Reese Multi-Plug Wiring Harness for Factory Tow Package - 7-Way and 4-Way Flat Trailer Connectors
- Shop: Pollak 5th Wheel / Gooseneck T-Connector with 7-Pole - Ford, GM, Dodge, Nissan w/ Factory Plug
- Shop: Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors
- Shop: Vehicle Sway Bars
- Shop: Timbren Suspension Enhancement System - Rear Axle
- Shop: Camper Tie-Downs
- Video: Review of Lippert Fifth Wheel King Pin - Standard Replacement - LC1270271
- Video: Brophy RV and Camper Steps - Truck Camper - AS25 Review
- Search Results: rear sway bar
- Shop: TorkLift Camper Tie-Downs - Custom Frame Mount - Front
- Search Results: truck camper tie down anchors
- Q&A: Are There Air Bags for a 2016 Ford F-350 Cab and Chassis
- Search Results: tr20117
- Search Results: 15x6 5x4.5 rims
- Q&A: How To Bypass Factory 12V Charge Circuit On 2019 Ford F-350 Super Duty
- Q&A: How To Activate 12V Trailer Charge Circuit On 2019 Ford Super Duty With Factory 7-Way
- Q&A: Troubleshooting Lack of 12V Power at 7-Way Trailer Connector on 2019 Ford F-150
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Choosing the Right Trailer Wiring
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Hitch
- Search Results: 90160
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Choosing the Right Brake Controller
- Search Results: hitch
on Custom Fit Vehicle Wiring
