Looking for Coiled 7-Way to 4-Way Adapter

Updated 06/30/2026 | Published 06/25/2026

Question:

Hey eTrailer Team I am looking for a Reese or other quality brand coiled trailer wire to adapt a 4-pin connector to the 7-pin connector on my truck. Please advise, thanks!

asked by: Garrett D

Expert Reply:

Hey Garrett, while Reese isn't around anymore the Curt adapter part # C57281 is a really great choice for a coiled 7-way to 4-way adapter like what you are looking for. Are you flat towing a vehicle?

expert reply by: Jameson C

Garrett D.

6/30/2026

Hey Jameson Thanks for your reply. I appreciate the link for reference, but noticed this is a 5-way flat to 7-pin adapter. I have one like this for now (my original one disintegrated!); I have the flat side taped-off, but was concerned about the open/unnecessary fifth plug). Everything works, but that 5th plug isn’t needed for my small boat trailer. What is “flat towing”? Also, do you carry LED trailer lights that have an integrated bright reverse light function? These are really interesting!

Jameson C.

6/30/2026

@GarrettD The fifth circuit is for the reverse light circuit and if it's not needed it can hang off the 4-way it is plugged into and there won't be any issues created. Flat towing is when you see a car towing another car with all four wheels on the ground. Most of the time it's a motorhome towing a smaller car that can be used once they arrive at their destination. We do have trailer taillights that have reverse lights built in like with the TecNiq part # TN75XR.