Question about 2004 Ford F150

2 Answers

Running trailer lights not working, but brake

Running trailer lights not working, but brake lights on trailer do..

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2 Answers

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  • Master
  • 984 Answers

Did you check the fuse for the trailer tow adapter paring lamps ? This is a separate fuse powered by a relay, it is not the same circuit as the truck's parking lamps.
This is fuse # F10 & The half size ISO relay, R201 in the fuse panel in the passenger side kick panel.
This is based upon being a new body style 2004, not the 2004 Heritage or Lightning models, those are different fuse & relay locations.

Posted on Jun 06, 2010

  • Charles Haley
    Charles Haley Feb 18, 2014

    My truck is a 2009 ford f 350

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  • Ford Master
  • 8,404 Answers

Running lights on your trailer are on the same circuit as your vehicle running lights. In other words, your tow vehicle lights must be on to have the trailer running lights on.

Check your ground and check the pin on your plug ... do you have power on the towed vehicle plug with the lights on? If yes, when you plug in your trailer, you should be able to power the running lights as well.

Like I said, check grounds and if that doesn't work ... check the lamps in each fixture.

Posted on Jun 05, 2010

  • Charles Haley
    Charles Haley Feb 18, 2014

    All the lights work on the 2009 f350 but the trailer lights don't work. The trailer lights work when I plug it in to my other truck

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Posted on Jan 02, 2017

  • 260 Answers

SOURCE: plugging in trailer there are not running lights to trailer

Could be a bad ground. Check the bulbs too.

Posted on Apr 09, 2009

  • 1 Answer

SOURCE: back-up lights and trailer running lights

My 2004 f150 has the factory tow package. It has a fuse for the trailer running lights seperate from the truck running light fuse.
Check, you may have the same set up...

Posted on Aug 27, 2008

Molson02536
  • 3854 Answers

SOURCE: trailer light hook up problem

It sounds like your have may have your brake light and running lights crossed on your wiring harness to the trailer. Good luck and hope this help's

Posted on Apr 08, 2009

co7196
  • 3433 Answers

SOURCE: 2001 Dodge Ram 2500, no running lights on trailer

The truck is protecting itself from the load impose by the trailer.. Chk the plug on the truck for wire gauge size. Turn any electrical loads off on the trailer, any and all. If fuse still blows then the fuse is either underated or the trailer has a dead short. In fact turn trail main power panel of. All lights work you say. So ck the inverter for defect byturning off the inverter on one of the trailers.

Posted on May 28, 2009

alicantecoli
  • 22246 Answers

SOURCE: My trailer running lights will not work.

sounds like a loose wire in the trailor socket ,the amount i repaired and i cant remember which number it is in the plug its either the red or the brown but as iam colour blind in these colours i always use a test light ,also check the wire where its strapped at the front of the trailor as they often chaffe here

Posted on Sep 05, 2009

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