Trailer Connectors

Trailer Connectors are a standardized set of connectors dictated by the SAE J1239, J2863, and J560 standards among others.

Below are the most common US trailer connector types.

4 Wire Position Connectors:

Image	Description/Applications	Vehicle layout
	The 4 position flat trailer plug is commonly used on small utility and boat trailers without brakes.

5 Wire Position Connectors:

Image	Description/Applications	Vehicle layout
	The 5 position flat trailer plug is commonly used on small utility and boat trailer without brakes and with reversing lights.

6 Wire Position Connectors:

Image	Description/Applications	Vehicle layout
	Pop up campers, travel trailers, campers, 5th wheel trailers.
	Pop up camper trailers.

7 Wire Position Connectors:

Image	Description	Vehicle layout	Connector name:
	The traditional 7-way RV blade format is typically used on 5th wheel trailers, travel trailers and campers. The trailer wiring colors for this configuration are different than those on the SAE configuration.		SAE J2863
	The SAE J2863 7-way RV blade format is typically used on gooseneck trailers, utility trailers, cargo trailers and equipment trailers.		SAE J2863
	For heavy duty vehicles, campers, travel trailers, semi trailers.		SAE J560 / ISO 1185