2005 Ford F-150 Logo
Posted on Oct 04, 2010
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I have a 2003 ford F150 and I bought a factory plug in trailer harnes but the only light that work now is the running light I got back under truck and tried the harnes with a tester and it seem the trailer lights side of plug is not hot but cant seem to find a fuse block for trailer

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  • Posted on Oct 09, 2010
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The fuses for the trailer tow adapter are in the normal fuse panels.

Engine Compartment fuse panel
101 - Is the battery charge circuit ( hot in run position )
20 - Left Stop / Turn fuse
19 - Right Stop / Turn
5 - Trailer tow reversing lamps & Trailer Tow parking lamps

Cab Fuse Panel
23 - fuse for the relay for the trailer tow battery charge circuit

All of these are in the owners manual

If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

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