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03 f250 trailer tail lights

Old 03-29-2010, 08:34 PM
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Default 03 f250 trailer tail lights

I have an 03 f 250 5.4L gas for a work truck and the trailer tail lights won't shut off unless the fuse is pulled out. I checked the truck plug with out a trailer pluged in to it and it alaways has 12v to the trailer tail lights. I think it is a stuck relay, but I can't find it. Any thoughts?
Old 03-29-2010, 09:32 PM
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Welcome to the site,,

The trailer tow park lamp relay is integrated into the central juntion box unit.. Non replaceable.. You might ty a sharp thump to the panel.. We just covered this a few weeks ago. The options would be an interrupt switch, wiring in a 'stand alone' relay for the park lamp function, or a replacement panel.
Old 03-30-2010, 05:54 PM
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Where exactly is the relay, behind the fuse panel? Thanks
Old 04-01-2010, 11:33 PM
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I think:::The panel should be located on/ near the driver side firewall. Small black box the size of a deck of cards but deeper.
Old 04-03-2010, 08:11 PM
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Old 02-08-2017, 08:01 AM
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dwitt, I hope you got the issue resolved. In most cases the problem is in wire kits and the fuses. To make sure you can tow safely replace them with OEM-style universal trailer tail lights and wiring.
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