The 2008 Ford F250 Super Duty Trailer Wiring Diagram is a must-have resource for anyone looking to connect their trailer to their Ford truck. This comprehensive diagram provides an overview of the wiring system, including the trailer wiring harness, trailer lighting circuits and the necessary components needed to make the connection.. The following pages show wiring diagrams for 2005 - 2008 F250 - F550 trucks. From 2005 - 2007 the wire color is Gry/BLK and is pin 21 on the ABS module connector. For 2008 + the wire color is Ye/Blue and it is also pin 21 on the ABS module connector. On the following pages, the first is 2005 - 2007 and 2008 is shown last.
1999 - 2003 7.3L Power Stroke Diesel - Factory Trailer Plug Wiring Diagram - I have a 2002 F250 that had the trailer connectors and wiring pre-wired and installed from the factory. Having a ground issue at the plugs and was wondering if anybody had a schematic on the factory trailer wiring? Thanks!. 2008 F250-F550 WiringDiagrams - Free ebook download as PDF File (.pdf), Text File (.txt) or read book online for free. The document is a table of contents for the 2008 F-Super Duty 250-550 wiring diagrams manual. It lists over 160 sections covering all electrical systems for the vehicle, including chapters on headlamps, climate control, engine controls, transmission controls, and component.