What Are Wire Functions on Factory 7-Way Trailer Connector on 2002 Ford F350
Question:
PLEASE HELP ! I am trying to find out what pins 6 and 7 are coming from on a 2002F-350 factory trailer harness connection on connector # 13A576 there is 2 blue wires and I know 1 is for trailer brake but cant find anywhere what the other one is from. Im thinking from brake controller but dont know how to wire it up, should I tie the 2 together? The schematics I have found both give 43 DB I assume dark blue but cant find anybody to tell me what they are. Thank you
asked by: Arthur K
Expert Reply:
The one and only truly reliable method to confirm what signal/function is carried on a vehicle wire is to test it. Wire colors are sometimes common to a certain lighting function; running light signals are often carried on a brown wire, for example. But wire color is neither consistent nor reliable as a means to determine the function carried. A circuit tester like # PTW2992 is the way to go.
If you refer to the linked photo showing a 7-way RV-style vehicle socket you will see the common function PTW2992.
Have a helper activate the vehicle light functions one at a time while you test. Ground the tester and apply the probe to each pin on the 7-way until you find the active circuit. You will then know what function is wired to what pin. It is not advisable to join any wires until you are certain of their functions.
Products Referenced in This Question
Product Page this Question was Asked From
7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- 4 Flat
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty)
- Q&A: Recommended 7-Way Trailer Connector on a 2002 Ford Excursion to Replace Factory Connector
- Q&A: Replacement 7-Way Trailer Connector for 2001 Ford Excursion
- Q&A: Correct Trailer Wiring Harness for 2002 Ford F250 or F350
- Shop: 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Shop: Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End
- Shop: Ford Replacement OEM Tow Package Wiring Harness, 7-Way
- Shop: Tow Ready Replacement 7-Way Harness and Socket for Factory Tow Package
- Shop: Brake Controller
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Hitch
- Search Results: brake controller
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Choosing the Right Trailer Wiring
- Search Results: trailer brake controller
- Article: Trailer Wiring Diagrams
- Video: Choosing the Right Brake Controller
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch wiring
- Q&A: 7-Way Trailer Plug Adapter or Compatibility with Lance Slide-In Truck Bed Camper
- Video: Tow Ready 4-Pole Mounting Bracket Installation
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Difference Between Curt and etrailer Trailer Hitch Receivers for 2020 Chevy Colorado
- Shop: Suspension Enhancement
- Video: Redarc Tow-Pro Liberty Brake Controller Review
- Search Results: etbc7
- Article: How to Choose the Right Trailer Hitch Class
on Custom Fit Vehicle Wiring
