Troubleshooting 2011 Ford Mustang Curt Wiring Without a Solid Ground
Updated 07/30/2025 | Published 07/23/2025
Question:
I have installed this and double checked my wiring connections, but every pin on the 4 pin connector is solid on except ground. I am thinking there is something wrong with the module itself. Please advise. Thanks
asked by: John C
Expert Reply:
Hey John, thanks for reaching out!
When you say the pins on the Curt 4-Way Flat Trailer Connector # C56496 are solid, do you mean they light up the light on your tester except the ground? The ground pin won't show power, but could pose an issue if you're testing for continuity and not getting a great reading.
If you can give me a little more insight I'd be more than happy to help you continue to troubleshoot!
Product Page this Question was Asked From
Curt 4-Way Flat Trailer Connector with Circuit Protected Powered Tail Light Converter
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- Universal Fit
- 4 Flat
- Plug and Lead
- Splice-In
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Will the B&W Trailer Hitch BW45RV Fit a 2026 Hyundai Tucson?
- Article: Trailer Wiring Diagrams
- Q&A: Ground Clearance of the Curt Trailer Hitch part # C94WR on the 2026 Hyundai Tucson
- Q&A: What is Difference between Trailer Mate and Curt Hitch for 2026 Hyundai Palisade
- Q&A: Semi Trailer Light Function Locations on Heavy Duty 7-Way Pin Connection
- Q&A: Troubleshooting Trailer Wiring that the Turn Signals Activate with Blinkers
- Q&A: Trailer Wiring Options for 2018 Audi Q5
- Q&A: Comparing Trailer Mate Trailer Hitch To Curt and B&W For 2019 Toyota RAV4 LE
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: What Do I Need To Tow A Trailer?
- Article: Routing the Power Wire for a Trailer Wiring Harness
- Article: Best Hitch Cargo Carriers
John
7/30/2025
I appreciate you getting back to me. I actually figured it out myself. I had the power and ground to the module reversed. Once I corrected it, everything worked as it should. Thanks again! John