Trailer Connectors

From YourSpec Automotive Wiring Wiki

Revision as of 12:34, 5 December 2025 by Kei (talk | contribs)

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

4 Wire Position Connectors:
Image Description 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 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 Vehicle layout
7 Wire Position Connectors:
Image Description Vehicle layout
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.
The SAE J2863 7-way RV blade format is typically used on gooseneck trailers, utility trailers, cargo trailers and equipment trailers.