Troubleshooting Trailer Brakes and Brake and Turn Lights Not Functioning With 7- to 6-Way Adpater
Updated 10/21/2015 | Published 10/17/2015
Products Featured in This Question
Question:
vehicle has a six round and trailer has a six blade plug We re only getting running lights Vehicle: Ford F350 Trailer: Gooseneck
asked by: Edwin M
Helpful Expert Reply:
First, I recommend testing the 6-pin round connector on your Ford F-350 to ensure it is functioning correctly. You can use a circuit tester, like # PTW2993, to test the functions at each pin.
The pin at the 12 o'clock position should have constant signal for the taillights and running lights. The pin at the 2 o'clock position is for the ground wire. The 5 o'clock position is for left turn and stop. The 7 o'clock pin is for right turn and stop. The 10 o'clock pin is for the brake controller output, and the center pin is for 12V power. It is easiest to have a helper when testing the connector so one person can be in the cab of the truck to press the brake and activate turn signals while the other tests the functions at the connector.
If the connector on your vehicle is functioning properly, you will also want to test the adapter you are using to make sure it is wired correctly and working properly. I have attached wiring diagrams showing how the 6-pin vehicle and trailer side connectors and the 7-way vehicle and trailer side connectors are wired, as well as a help article on trailer wiring for you.
If you need a new adapter, the Hopkins Adapter 6-Pole to 7-Way # 47435 that you referenced is a great choice. Another option is to wire your own adapter. For a trailer side 6-pin and vehicle side 7-way blade connector for a new adapter, I recommend using the Pollak Replacement 7-Ways # PK11893 and the Hopkins 6-Way Molded Trailer Wire Connector # H20036. You will want to wire the trailer side 6-pin to the 7-way connector function-for-function.
When looking at the back side of the 7-way trailer connector, the white wire from the # H20036 will connect at the 5 o'clock position, the brown wire will connect at the 1 o'clock position, the green wire will connect at the 9 o'clock position, the yellow wire will connect at the 3 o'clock position, the red wire will connect at the 7 o'clock position, and the black wire will connect at the 11 o'clock position.
If you do not need the reverse light function on your trailer, you can eliminate the need for the adapter by changing out the 7-way connector on your trailer for a 6-pin connector like # H20036.
Product Page this Question was Asked From
Adapter 6-Pole to 7-Pole Trailer Wiring Adapter
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 6 Round to 7 Blade
- Plug and Lead
- Hopkins
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Article: How to Measure for Trailer Hitch Drop
- Shop: Hopkins 6-Way Connector with Jacketed Cable - Trailer End - 8' Long
- Shop: 6-Way Molded Connector with Cable - Trailer End
- Shop: Trailer Hitch
- Shop: etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector
- Shop: Towing Mirrors
- Video: B&W Turnoverball Underbed Gooseneck Trailer Hitch Complete Installation - 2024 Ford F-250 Super Duty
- Shop: Kenda Karrier KR53 ST205/75R15 Radial Trailer Tire with 15" Silver Mod Wheel - 5 on 4-1/2
- Shop: Truck Bed Mat
- Video: Checking Out the etrailer Anti-Rattle Locking Hitch Pin
- Shop: Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Square - Red Lens
- Shop: Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side
- Article: Trailer Maintenance Schedule
- Article: Trailer Wiring Diagrams
- Shop: etrailer Electric Trailer Jack - Drop Leg - A-Frame - 18" Lift - 5,000 lbs
- Video: Breaking Down the LED Combination Trailer Tail Light
- Video: etrailer Magnetic Hitch Receiver Reducer Sleeve Feature Review
- Video: Feature Review LED Combination Tail Light Kit for Trailers under 80" Wide
- Video: Review of the Combination LED Trailer Tail Light
- Video: Deka Jacketed 4-Wire Review
- Shop: Trailer Wiring
- Q&A: Replacing 6-Way on Trailer With 7-Way Connector
- Article: Must-Have Flat Towing Components
- Q&A: Wiring Diagram for the Adapter 6-Pole to 7-Pole Trailer Wiring Adapter # 47435
- Q&A: Recommended Adapter for a Audi Towing a Trailer w/ LED Lights
- Q&A: Potential Replacement Options For a Fastec 44610 Entry Door Lock
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Correct Replacement Jack for Kwikee Level Best 3000 Hydraulic Leveling System
- Q&A: Replacement for a TDE LP8500 Boat Trailer Acuator
- Q&A: Replacement Dexter 8-247 Wheel Hub
on Custom Fit Vehicle Wiring
