Question about 2004 Ford F150
Running trailer lights not working, but brake lights on trailer do..
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
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
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
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
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
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
Tips for a great answer:
Dec 13, 2012 | 2008 Ford F-150
Apr 29, 2017 | 2002 Chevrolet Suburban 2500
Jul 06, 2010 | 2008 Dodge Grand Caravan
Feb 10, 2010 | 2003 Chevrolet Tahoe
Nov 02, 2009 | 2008 Jeep Wrangler
Oct 11, 2009 | 1987 Toyota Pickup
Sep 28, 2009 | 1998 Dodge Grand Caravan
Jun 26, 2009 | 2005 Nissan Xterra
Jun 10, 2009 | 1998 Ford Expedition
1,211 people viewed this question
Usually answered in minutes!