Troubleshooting Curt Trailer Wiring Not Working for a 2017 Hyundai Santa Fe
Updated 06/04/2025 | Published 05/31/2025
Question:
My 7-pin trailer wiring stopped working on the vehicle side. I tested it with a different vehicle and the trailer side works fine. I have the Curt factory wiring harness for a 2017 Hyundai Santa Fe XL. The brake controller and constant battery power wiring seems to be functioning fine. It is just the lights that arent working. Is it possible that it is the control unit on the harness that is not working? All fuses have been replaced and it has blown the fuse several times that is off the wiring harness/control unit. I was wondering if I can just replace the factory wiring side and leave the electric brake and power charge line as is. Thanks!
asked by: Scott S
Expert Reply:
Hey Scott, thanks for reaching out!
What wiring kit do you have on your 2017 Hyundai Santa Fe? The Curt T-Connector # C56332 would be somewhat easy to replace, but it only has a 4-Way flat connector.
Is this the type of wiring you're wanting to replace?
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- CURT
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Scott S.
6/3/2025
Thanks for the reply Jon. If I cut off the 4-pin connector could I not just wire those directly to the 7-pin connector/adapter? Leaving the constant power connections for the electric brakes and battery charge lines as is? Thanks