trailer connection

[RACCLC]

I need to replace my factory 4 pin trailer plug connection to a 7 pin trailer plug. Does anyone have any suggestion on how to do this ? I have a 2003 sport-trac help....

 

[05dakotatrac]

check out e-trailer.com they have a wiring schematic http://www.etrailer.com/faq-wiring.aspx

hope this helps it covers all 4 connectors