Is there a 6-Way to 4-Way Adapter?

Updated 07/18/2026 | Published 07/15/2026

Products Featured in This Question

TowSmart 4-Way Flat Trailer Wiring Kit - Vehicle and Trailer Ends

(9)

$8.23

LCD Digital Circuit Tester

(28)

$27.93

Question:

I have a 1978 Chevy PU dad used to pull a horse trailer. the light connector on the bumper has 6 flat prongs. Is there an adapter that will allow a 4 pin flat connector like what U-Haul uses?

asked by: Fernando G

Expert Reply:

Hey Fernando. Unfortunately, I do not have or know of an adapter that'll allow you to connect your older 6-way flat trailer connector to a standard 4-way flat that U-Haul has on their trailer's.

My only option would be for you to purchase the TowSmart 4-Way Flat Trailer Wiring Kit item # TS48RR and replace your 6-way flat with a standard 4-way connector. You would want to use a circuit tester like item # PTW2992 to test the wires going into the 6-way so you can match up the four you need.

Here's how the wiring functions are arranged on the 4-Way Flat Trailer Wiring Kit item # TS48RR.

White Wire - Ground
Brown Wire - Running / Tail Lights
Yellow Wire - Left Turn / Brake Lights
Green Wire - Right Turn / Brake Lights

expert reply by: Jerred H

Fernando G.

7/18/2026

That’s what I was afraid of. We’ve always used our open stock trailer for literally everything since early eighty’s. Guess it’s time to modernize LOL. Thanks for the info and diagram. Ferny

Jerred H.

7/18/2026

@FernandoG You're welcome! Actually, that TowSmart 4-Way Flat Trailer Wiring Kit item # TS48RR has connectors to redo both your truck and stock trailer's 6-ways into 4-ways. So long as it doesn't have brakes or a battery that needs charging this will control the lights and would be a pretty quick swap out.