Ford Super Duty (1999-2016) :: Fuse For Travel Trailer Running / Tail Lights Blows Immediately In Reverse
Mar 3, 2014
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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My 99 f250 ran hot while towing my travel trailer when the fan clutch gave up. ever since iv been noticing coolant loss and pressure in the day tank.ive changed the water pump,radiator. day tank and cap plus the thermostat.
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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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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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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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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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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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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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The rear tail lights on my truck have been out for a while now. I wasn't doing much driving at night so it wasn't much of a bother but the new job is getting me home a little later and having to drive with my hazards on is getting old fast.
My radio wasn't working either and I disconnected it a while back hoping maybe it had something to do with my lights shorting out but no luck. It remains disconnected. Just in the past few days my front running lights have went out as well.
I've tested all fuses multiple times (and replaced a couple of them) and checked and replaced bulbs. My brake lights, headlights, dash lights and hazards all work fine. I have the trailer light hook up on the rear bumper and disconnected it at the wiring harness as well hoping it was the problem but it wasn't.
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I Have a 2002 F 250 That I recently changed the fuel pump. and now I'm having a tail light problem. when i start the truck, my tail lights and plate lights comes on (dim). if i turn my head lights on the truck stalls out. if i step on the brake or put the truck in reverse it stalls out. if i put it in drive it runs just fine. i checked my fuses and relays and the problem is still there even when the relay and fuse for the lights are out. when i turn the truck off all the light go out.
can't seem to find any info on this problem anywhere.
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My 2005 f350 reverse lights just started to not work . So I checked the fuse and it was blown and every time I put new fuse in it blows, where to check. Sounds like a ground issue am I correct .
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I have a 1995 Ford f250 Powerstroke and i do not have turn signals, rear running lights, brake lights or reverse lights. i checked the fuses and they seem to be good but i dont want to tear everything out to check the harness if it could be a bad ground. any insight?
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The truck starter and radio would magically turn on and off after the first rain, it was hard on the starter and I had to replace the starter and the cause of that problem was the vacuum line coming from the brake booster running over the top of the wires in the 4 plugs attached to the driver side fender. It rubbed through exposing the wires and got wet connecting them. I cleaned them and put the electrical tape silicone and then it has been working fine for a couple months.
Now every time I try to start fuse #20 blows. So far I have traced the wire that goes through fuse 20 through the firewall being the blue wire with a orange stripe on it it goes through the top plug upper left most wire. From there I followed it through the 4 wheel fender plugs the furthest plug from the firewall still being the blue with orange stripe. If I unplug that plug and try to start the truck it won't start but the fuse does not blow.
I then followed that wire all the way to the neutral safety switch. I hate tracing wires. (About 8 hours so far). I am thinking neutral safety switch. Also another thing I am thinking is weird is that blue wire with the orange stripe is grounded when the safety switch is plugged into the transmission and if it is unplugged is is not grounded. And I don't think it is supposed to be grounded because that is the hot wire when the key is in the start position.
Details about the truck : 1999 f250 diesel 7.3 super duty automatic 4x4 dated 4/99
I have taken pictures of the plugs and wires I was going to post it but don't remember how.
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Any info if the "Aux" terminal on the trailer harness wiring on '01 F250s is for reverse lighting? I'd like to put some on my stock trailer. Also, is the "12v" terminal feed switch operated or hot always?
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Recently got a 2003 f 250 6.0 that has had a little work done on it. Absolutely love it with 1 exception. When I turn on the ac or heat It blows a 10 amp fuse that goes to the blower relay. It was occasionally now it's all the time.Blower ok, fan speed resistor ok. What or where to look.
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I left town tonight and dad called to say I had no tail lights. I stopped and checked the book to see where the fuse is and couldn't find anything for the tail lights or parking lamps. I have brake lights, both rear turn signals and the tail lights blink when you lock it with the fob. The trailer socket shows I have trailer tail/marker working. Why don't my tail lights work?
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2004 ford f 350 super duty, 6.0 Liters international diesel, 4door, 4x4, long bed, dual rear wheels. Over 200,000 mileage. I have no power to the trucks brake lights and no power to the tow plugs trailer brake lights, which is the center left and the center right tow plug blade style contacts, while using a 12 volt test light! All fuses are showing good and I replaced the brake switch at the brake pedal, and I also replaced the towing plug with the short wire and connector at rear of truck which is under the rear bumper and the frame mounted tow hitch bar
- Are there any relays that control the truck brake lights and the trailer brake lights ?
- If yes where are the brake relays exactly?
- Have I missed or not done something else to correct the problem?
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I have a 07 f250 and wanted to change them to the 08-14 tail lights. Did Ford change the size or a simple switch...
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I have a 2010 F250 super duty and I cannot figure out what is wrong with my 7 way for trailer lights. I have brake and turn signals but no tail lights. I have checked all fuses and relays and they are fine.
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I have a 2001 f250 v10 lariat ext cab. i was going to get wood the other day down a muddy road. My radio went out and all my running lights. i replaced the fuse radio and now the switch. Still nothing. Could it be a bad ground? i ran a jumper wire on my old switch and they worked then just stopped again. if it is a bad ground where would it be located.
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Anyways I have a 2006 F350 6.0 and a couple weeks ago I have been having issues with my running lights. In the fuse box under the dash fuse location 17 blows as soon as I insert the fuse leaving me with a short somewhere, no instrument cluster lights (but the instrument cluster gauges work and operate fine), and no running lights on the truck. I have been looking for hours and days and can't seem to locate this short (which I am assuming it is).
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