Ford F-150 (2004-2008) :: Running Lights On Trailer Will Not Come On


Aug 4, 2012

I have a 2004 f150 fx4. My running lights on my trailer will not come on. Brake lights work, turn signals work, back up lights work. Had my boat mechanic check the trailer and that showed that the lights work fine. So I started checking fuses on the truck. Fuses all looked good. Then I went into the Auxiliary Relay Box in the engine compartment on the left fender. In the spot marked Trailer Tow Park Lamps (R201), theres no relay. R202 is for the Fog lamps, same relay. I pulled the Fog Lamp relay out and went to put in R201 for Trailer lamps, but there's no contacts in the R201 slots. The relay goes in with ease and just falls out. No contacts. Whats going on?

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Ford F-150 (2004-2008) :: Trailer Lights Inoperative - No Power Back To 7 Pin Connector

My trailers lights aren't working at all- so frustrated right now!! I've checked all the fuses and those are good, I've got no power back to the 7 pin connector...

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Ford Super Duty (1999-2016) :: Trailer Has Running Lights But No Turn Signal Or Brake Lights

2013 F250 XL with factory towing package.

My camper and boat trailer do not have turning signal or brake lights when plugged into the round seven pin trailer connector. I have tried both the connector in the bed and under the bumper. I've also connected the trailers to other trucks and the lights work fine so I know the problem is in my truck.

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Ford 6.0L Power Stroke Diesel :: Trailer Running Lights Not Working

Is there a fuse or something to check? All other lights work, just book the running lights

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Ford 6.7L Power Stroke Diesel :: Trailer Running Lights Fuse Location?

I've been looking for the fuse that runs the trailer running lights and couldnt find it and it got dark on me.. Does anyone know if its under the hood or inside the cab? I blew the running lights fuse hooking up the trailer while the lights was on...

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Ford F-150 (2009-2014) :: 2010 - No Power To Running Lights At Trailer Plug

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Ford 6.7L Power Stroke Diesel :: Trailer Running Lights Stopped Working

luckily about 5 minutes from home my trailer running lights AND the lights on my dump truck body stopped working. i assume they hooked the lights to my dump body to the trailer lights. i was towing an old trailer that has electrical issues so I'm sure that caused it. Under the hood there is a 30 amp fuse #26 that i think is the culprit. (All the other similar fuses are shiny and that one is kinda black). I've never bought fuses like this before, what type is it? it's a big square one. Are they available at auto zone? Does the whole thing pull out and do you need a special tool for it?

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Ford Super Duty (1999-2016) :: 2005 F250 - No Trailer Running Lights

I have a 2005 Ford F-250. I have checked power to the rear harness and all is good except for the tail/running lights.

Is there a fuse for the tail lights? I have checked the manual and don't see one called out. And the relays under the hood are labeled stop lights/turn signals and those are working fine.

I will see if I can trace the brown wire from the rear harness backwards, but it may be a simple fuse.

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Ford Super Duty (1999-2016) :: 2005 F250 - Trailer Running Lights Always On

I have a 2005 ford f250 with the factory installed brake controller and towing package,until recently all was well,I tow a fairly large travel trailer and last time I hooked the trailer to the truck I noticed the running lights on the trailer were lit, I checked to make sure that I did not have the parking lights turned on or the headlights. I did find posts about the running lights not working and was surprised to find there is a relay somewhere on the central junction fuse block that was integral to the cfb and not user serviceable. Could my problem be that this relay failed in the closed position or am I not going in the right direction in my quest to find this problem. Also looking for a diagram of where this relay is located on the central junction fuse block? I would also consider doing a work around solution rather than having to replace the entire fuse block.

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Ford Super Duty (1999-2016) :: No Power For Trailer Running Lights At Connector End

03 f350 7.3L. Have no power for the trailer running lights at the connector end. No power when the end is split and no power at the next connector above the spare tire. I have power at the fuse (38) and the fuse is good. What is the best connection to check next? Is there a common culprit that might cause this problem somewhere? I know 3 more connectors are in the frame by the fuel tank but pretty much lose track of which one might have the wire for the trailer.

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Ford Super Duty (1999-2016) :: Running Lights Limit On Trailer Wire Harness

Any limited number of lights the factory trailer harness on the truck can tolerate? I'm looking to add some extra running lights on my trailer, also want to put a couple of lights on each running board on the truck, they will be tied in with the trailer harness since it is not monitored by the BCM. I did a search on this a few different ways and couldn't find anything.

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Ford Super Duty (1999-2016) :: 2005 F350 - Cannot Get Running Lights To Work In Trailer

I have an 05 f350. I cannot get trailer running lights to work. All other lights work. Trailer brakes work, battery charge for dump trailer. I've checked fuses under dash and under hood. Everything checks out. I'm Stumped.

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Ford F-150 (2004-2008) :: No Running And Marker Lights?

The running lights and marker light on my trailer no longer work when I connect to my 2008, F150 4x2 Supercab, XLT, 4.6 V8 Auto with Tow package. Brake and turn signal work fine. The running lights, all the lights work on the trailer work when I connect to my Chevy so I know the problem is in the F150.

I have confirmed the ground to the 7 pin and 4 flat connector is good so I am thinking it must be a fuse or relay. Which specific fuse or relay should I check or replace?

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Touareg :: No Running Lights - Boat Trailer Uses 5 Pin Flat Plug

I have a VW Touareg hitch installed by the dealer. I tested the plug this weekend and found that I do not have running lights. Turn signals and brakes work fine. I discovered that my boat trailer uses a 5 pin flat plug to the round 7 pin that fits into the Touareg hitch receptacle. I believe most trailers use a 4 pin. Is there a fix?

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Ford F-150 (2004-2008) :: No Dashboard / Fog / Plate And Running Lights

I have a 2007 f150 pick up and all of a sudden my running lights (front and back), dashboard lights, fog lights and plate lights stopped working. I ckecked all the fuses with a voltmeter and all are working.

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Ford Super Duty (1999-2016) :: Fuse For Travel Trailer Running / Tail Lights Blows Immediately In Reverse

I am having a problem with trailer lights and an 03 350. When the truck is in reverse the fuse for travel trailer running lights and tail lights blows immediately. Changing plugs on the truck did not work. Truck has been hooked up to 4 other trailers including another travel trailer with no problems. Our travel trailer has been hooked up to an 08 and a 2011 truck with no problems. Fuse 38 20 amp. 7 post rv plug.

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Ford F-150 (2004-2008) :: Brake Lights On Whilst Truck Not Running?

At 2:30am this morning I looked out my window and saw my brake lights and third brake light come on for about 5 seconds and then go off. This scenario kept repeating itself. I went to drive my truck 2007, and the brake lights remained on even when the lights were turned off when I was driving. I also need to seal the third light. Brake regulator has been replaced.

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Ford Wiring/Electrical :: 7 Pin Trailer Wiring - Running Lights Not Working

Just bought an 04 Super duty with the factory plug 7pin and 4 pin plug. Checked the fuses and finally tracked down the 2 relays under the hood but can't seem to find anything wrong. Everything on the trailer works except for the running lights. Is there another fuse or something I have missed? Trailer works fine on my buddies Duramax and worked fine on my old 97.

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Ford F-150 (2004-2008) :: Vibration When Towing A Trailer At 52 Mph MPH

I recently purchased a 2006, 4x4, low mileage and when towing a trailer the truck develops vibration right at 52 mph. Dealer has not found the problem.

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Ford F-150 (2004-2008) :: Rattling Noise When Trailer Hooked Up

I have a 2007 f-150 fx4 supercab with the 5.4, it has about 37,500 miles on it. Yesterday I hooked up my trailer with no more than 800lbs of lawn mowers and as soon as I was on my way I heard a terrible rattling noise coming from the truck or the trailer. I unhooked the trailer and drove up and down the driveway and heard no noise, hooked the trailer back up and right away the rattle came back. At this point I hooked up the trailer to my dad's truck hoping it was the trailer and I drove it around the neighborhood hoping to hear the noise. No noise. So I hooked back up to my truck to drive home and the noise came right back and was even worse.

The noise was a rattling noise which I would say sounded like bb's rattling around in something, which had/has my thinking catalytic converter but no check engine light or anything has popped up. Also the noise doesn't happen unless the truck is hooked up to my little trailer with weight that I consider insignificant. So my question is could it be the catalytic converter and the the light load causes it and it will eventually occur all the time, or could it be something else that I'm not considering. I'm going to try to get it into a local mechanic but with it being the end of the month he's probably swamped with inspections. I don't want to drive it until I know what it is because I don't want to do damage to the truck.

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Ford F-150 (2004-2008) :: Front End Shake When 5 X 10 Trailer Attached?

Over the past year, I have had an issue with the front end shaking on my F150.

I have a 5 x 10 trailer. Weight capacity is roughly 2200 pounds. I hook up my trailer empty and head down the road. When I hit about 55 mph and above, the front end starts bouncing/shaking/vibrating.

Now I put a load on the trailer. Get going down the road. Hit those same speeds - no shaking/bouncing/vibrating. I have had a mechanic ride with me to check it out. First place to start, he told me, jack it up and see if anything is loose. I have not done that yet.

He has the same opinion as I do. This makes no sense. No load, shakes. Load, no shakes. You would think it would be opposite.

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