Troubleshooting Trailer Connector Not Functioning Properly
Question:
My trailer connector is not working properly. Harness is properly plugged in and properly wired. Sometimes it works well, but most of the time, it doesnt. Either the left or the right turn fail to light. It happens with both connectors, the 7 and the 4. I also lubricated the connections to no avail. Can you please help me? Thank you and have a good weekend.
asked by: Danny B
Expert Reply:
The first thing to do is figure out if the problem is on your tow vehicle or your trailer. To test this you'll simply need to use a circuit tester # PTW2992 and check the various pin locations for function. For a connector that has both a 4-Way and 7-Way, like the # ETBC7, it would be best to check both connectors so you know if it's that circuit or just that connector. I've attached some photos to show what functions those connectors should carry.
If all of your tow vehicle connectors have the proper functions then the problem is on the trailer side. Either way the solution is the same; check your connections to make sure they are secure and clean, check the wiring to make sure it isn't damaged, and check all of your grounds to make sure they are securely connected to a clean, bare-metal surface.
Attached is a helpful article on troubleshooting wiring you can check out as well.
Products Referenced in This Question
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
Product Page this Question was Asked From
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Q&A: How to Activate Trailer Lights on 2014 Jeep Grand Cherokee Laredo with C55515 Wiring Harness
- Q&A: Why Do I Have Constant Power On The Right Side Of My Trailer?
- Q&A: How do I Diagnose My Left Turn Signal Not Working on My Trailer?
- Q&A: Trailer Right/Left Blinker Come On Together and Right Side has Constant Power in Trailer Connector
- Q&A: Troubleshooting Trailer Wiring of 2015 Grand Cherokee That Stopped Working
- Q&A: Which Pin On A 7-Way Should Have Constant 12V Power When Vehicle Is Running
- Q&A: Recommended 4-Way for a 2004 Chevrolet Silverado Without Tow Package
- Shop: Vehicle Tow Bar Brake System
- Shop: Demco SBS Air Pressure Stop Light Switch Kit for Towed Vehicles - Air Force One
- Search Results: base plates
- Article: Trailer Wiring Diagrams
- Shop: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Video: Blue Ox Patriot Portable Braking System Installation - 2022 Ford F-150
- Shop: Base Plate for Tow Bar
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: tow bar
- Shop: Demco Stay-IN-Play Duo Flat Tow Brake System for RVs w/ Hydraulic Brakes - Proportional
- Shop: Vehicle Tow Bar Wiring
- Video: Review of Blue Ox Tow Bar Braking Systems - Patriot Portable Braking System - BLU37TR
- Video: Blue Ox Patriot Radio Frequency Portable Braking System Review
- Shop: Trailer Wiring
- Search Results: base plate
- Article: Best Vehicles to Flat Tow Behind an RV
- Shop: Blue Ox Patriot Portable Flat Tow Brake System - Proportional
- Shop: Trailer Hitch
- Shop: Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Proportional
- Video: Choosing the Right Trailer Wiring
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Search Results: blue ox
- Article: Must-Have Flat Towing Components
on Wiring
