Solution for No Power to the 12v blade on 7-way Connector on 1999 Ford F250 Super Duty Truck
Published 01/19/2017
Products Featured in This Question
Question:
Although the black wire is present at the harness location at the rear of my truck and my truck was supposed to have been equipped with a tow package, I dont seem to have power to maintain the battery on my dump trailer. I have the wiring to the + terminal of the trailer battery and the - terminal grounded to the frame of the trailer as has been mentioned in a number of the other QandAs. Without having power to the appropriate blade in the truck connector I am assuming that it is not maintaining the charge to the trailer battery. That certainly seems to be the case since I have to charge the trailer battery too frequently. It is a fairly new battery. I have checked in the owners manual and it seems I am missing a relay although the fuses for this purpose seems to be in the correct places. I have seen where you have suggested to run my own wire to the 7-way from the + terminal on the truck battery in combination with the Pollock circuit breaker # PK54540. If I do this as suggested, it will not cause or create any circuitry or shorts in the vehicle, correct? I am just curious if there is a way to power the existing wire to the harness since it is supposedly there for that purpose. Running my own wire seems to be bypassing or rerouting the power through another means that appears to already be present. What do you think or suggest. BTW, Ground is good because I have power at all other wires when tested. Thanks!
asked by: Floyd C
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
Continue Researching
- Q&A: Is a Diode Required on the 12 Volt Pin for Charging a Trailer Battery
- Shop: Gooseneck Hitch
- Shop: Fifth Wheel Hitch
- Search Results: husky gooseneck hitch
- Search Results: fifth wheel base
- Q&A: Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch
- Article: Trailer Wiring Diagrams
- Shop: B&W Ball and Safety Chain Kit for Ford, GM, Chevy, and Nissan Titan XD Underbed Gooseneck Hitch
- Search Results: gooseneck hitch
- Shop: Trailer Wiring
- Video: B&W Companion OEM 5th Wheel Hitch Manufacturer Breakdown
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Shop: Suspension Enhancement
- Search Results: fifth wheel hitch
- Video: Firestone Ride-Rite Air Bags with Easy Mount Compressor Feature Breakdown
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Options for Towing A Fifth Wheel With A 2022 F-350 Short Bed With OEM Puck System
- Shop: B&W Companion OEM 5th Wheel Hitch for Chevy/GMC Towing Prep Package - Dual Jaw - 20,000 lbs
- Search Results: 5th wheel gooseneck adapter
- Shop: Trailer Hitch
- Video: In-Depth Look at the B&W 5th Wheel to Gooseneck Pin Box
- Article: How to Measure for Trailer Hitch Drop
- Q&A: Firestone Air Bags for 2026 Ford F-350 FX4 Dually
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Search Results: trailer hitch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: B&W Companion OEM 5th Wheel Hitch w/ Slider for Chevy/GMC Towing Prep Package - Dual Jaw - 20K
- Q&A: Do I Need a Sliding 5th Wheel Hitch for a 2026 Ford F-350 w/a 6-3/4' Bed?
on Automotive Tools
