Tractor 7 Pin Trailer Wiring

Tractor 7 Pin Trailer Wiring. There is a lot wiring that you have to tie into your truck's wiring harness, but it is easier to do than it seems. Refer to your trailer service manual and plug installation instructions to avoid wiring problems that may damage your trailer, brake controller or vehicle!

Cole Hersee-Cole Hersee 7-Pole Tractor-Trailer Connector ... (Lucinda Barnett)

Anyone have a diagram of which pins supply which functions? Wired as per diagram - no joy. Regardless of wire color, the pin position for function is pretty standard.

I drew this crude diagram to help explain.

This video shows the process of relocating a trailer wiring connector from inside of a truck box to the rear bumper near.

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Wired as per diagram - no joy. There is a trailer pig tail behind the passenger side rear tire. Wiring up a truck for trailer towing isn't as hard as it looks; many new trucks come prewired from the factory, and there are kits that make the operation plug and play.