Is There a 4-Way Round on Truck to 7-Way on Trailer Adapter

Updated 09/19/2024 | Published 09/13/2024

Products Featured in This Question

Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round

(4)

$46.56

Adapter 4-Pole to 7-Pole and 4-Pole

(659)

$61.47

Adapter 4 Round to 4 Flat

(83)

$11.94

Question:

I have a tow truck with a 4 pin round light connector for trailers. I often need to pull a trailer with 7 pin round . Do you have a harness I can use? I know that i will lose the brake and power function. I will just need to operate lights. Thanks

asked by: Randall R

Expert Reply:

Hi Randall,

There is a way to do this, but you'd have to use a couple adapters since there isn't a straight 4-round to 7-round. So first you'll need an adapter for the 4-way, the Adapter 4 Round to 4 Flat # 47465.

Then for the 7-way I'm not sure if you were referring to a 7-round or a 7-blade (the difference being simply the pin shape, either rounded or flat in your 7-way). If you have a 7-round you'd use the Custer Trailer Connector Adapter - 4-Way Flat to 7-Way Round # KIT-7P-4.

If you have the more standard 7-blade you'd need the Adapter 4-Pole to 7-Pole and 4-Pole # 37185.

expert reply by: Kyle S