Will A Trailers Running Lights Work On Vehicle With 4-Way and Trailer With 7-Way?
Updated 02/03/2026 | Published 06/30/2024
Question:
Will this kit work for my trailers running lamps? My trailer has a 7 pin plug but i already bought ba 4 on to 7 adaptor.
asked by: Jd
0
Expert Reply:
JD, using the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56281 with a 4 to 7 Adapter # 37185 will allow the running lights, turn signals and brake lights on your 7-way trailer to function. Any reverse lights, trailer brakes or charge line on your trailer will not get power since those are on the other 3 circuits which would have to be hard wired.
expert reply by:
Bud M
0
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- CURT
more information >
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Jesse M.
2/3/2026
Hey JD, how did things go with the Curt wiring harness and the 4-to-7 adapter on your trailer? Did the running lights and turn signals work like you needed? Your update could make it easier for the next person setting up a similar connection.