Ford Super Duty (1999-2016) :: F550 Trailer Wiring Harness - Getting Shorts Whenever It Rains
Mar 16, 2017
I recently purchased a 2011 F550 Super Duty with a flatbed mounted on it. Turns out, the trailer wiring harness is totally screwed up and I am getting tons of shorts whenever it rains. Going through it front to back, we are finding multiple problems like missing fuse box covers, damaged fuses for starters. The Ford dealership in Texas that did my prepurchase inspection for me totally missed all of this, so i am stuck holding the short end.
IN the rear of the truck we detected shorts in several areas. One of them is in this adapter pictured along with this. Is this a Ford part, or does it appear aftermarket? Is it just an adapter or is it more than that? I am just now getting to l know this truck more specifically. given the date of manufacture on the label it would seem to be from Ford??? Part # is 99-004 and 71-012-A...
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We bought a 2012 f550 chassis and had a utility bed outfited. As far as I know the truck does not have a tow package (major F-up). They did install a receiver and electric in the rear. The 7 way pin in the rear does have the appropriate wires (including blue). I can not find the harness in the cab under the dash. I have looked near the radio where I have found the harness on our other trucks. I specifically looked for the red white and blue wire under there. Where is this harness? Is the harness still in the cab even without the tow package? This will be for the old school plug in controller, not the ford intergrated contoller.
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I am looking at getting my new truck, my 05 F350 6.0, with factory trailer brake controller, all set up for a gooseneck. I was wondering if there was an OEM kit to add a trailer connection plug to the inside of the bed? If there is, what are the part number(s)?
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The pigtail from my bumper mounted 7-pin to the factory connector is all hacked up from the previous owner so I'm looking to replace that pigtail. Also wondering if there should be 2 connectors down there to add a connector for my gooseneck or do I need to splice another universal 7-pin into the bumper light pigtail? Also, is there another (preferably slightly cheaper) option besides e-trailer for such a connector?
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I'm still fighting tow harness problems on my '01 F 250. I started by replacing the 7-way pig tail with a new one which didn't work. Then I undid all the butchering of the harness that was done previously. The factory harness had scotch locks all over it that were used to splice in a 6-way and a 7-way into the bed. I liquid taped all the nicks in the wires. Then I checked for power at the factory harness end where the pigtail plugs in. I have park/running lights, and one of the ports flashes for the left turn signal/flashers/stop lamps. I got rained on before I could check further up the wire. If I have no power to the wire further up is there another place to check?
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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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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 a 2006 F250 and my 7pin and 4 pin connectors are just hanging loose. I'm not sure what happened to the factory bracket. What is the part number for this bracket? Also, where does it mount to? I looked under the truck and couldnt tell where the factory one mounts.
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I have been tracking down my ABS light and found that the left front wheel speed sensor has had the wiring harness ripped off from behind the front wheel. I have about 2ft of the harness coming off of the actual sensor.
Question is, since I cannot locate any wires that this seems to be able to be connected to, can I simply cut and splice these wires directly into the Tan/Black + Tan/Lt Green wires going straight to my ABS controller?
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Installing a Pop N Lock on a 2016? What were the wire colors you tapped into?
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I'm trying to find out what the two connectors in the image are.. I've looked through the manual that I have and searched around on the web and find nothing.
They're on a 2015 F250. "upfitter" switches were installed from the factory.
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Driving the truck today I noticed mssg from info on dash " problem with trailer wiring". I wasn't hauling anything. the message went away on my next stop when a truck was turned off. On my next stop, I was pulling into a parking space truck stalled and I saw another message saying something like " please pull over safely and stop a truck." Luckily I was already parked. the truck would not start or even turn over. after about an hour truck started but brake symbol was on the dash.
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I need to connect a remote start stop for a bucket truck attachment to this new 2016 F550. Found everything except the ignition wiring harness diagram. Need to know what I can tie in to.
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Every time I touch the brakes I now get a very annoying beep and an error message that says "wiring fault on trailer." I don't have a trailer hooked up so not for sure what's going on. The error message on the console I can live with but that loud beeping is driving me crazy.
If you hit the brake and keep the pedal depressed, then you only get the initial beep and then it goes away. The problem for me is I live north of Dallas so if I'm in traffic then I'm constantly hitting the brakes. I called my dealer today so I'll wait to hear what they have to say.
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I have a 2008 F450. What may be going on with my truck. In the past the truck would blow the fuse for the door locks. Currently the display is showing wiring fault with no trailer attached, the horn is not working and the cruise control has stopped working. I've covered the basics and checked all relays and fuses and haven't found a faulty one yet. I'm thinking bad ground or possibly bad GEM module???? I've read and read topics and am more confused as to what it could be now than when I started.
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I've got an intermittent Trailer Wiring Error message that started appearing with a trailer connected on my '11 F250.
Brakes and lights work OK on the trailer, I thought I had read on the board here that there was a TSB for this, but I cannot find it.
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While engine was running. brake switch "recall harness" shorted to exhaust manifold blowing fuse 22. truck died instantly. found the short and replaced fuse. checked all fuses good but no start since. WTS indicator stays on. tried a new GPR and a new CPS.
Does IPR and brake switch (on master cylinder) share fuse 22? fuse 22 holds now (when wire was fused to exhaust manifold it blew as soon as key turned on). unplugged FBH no change. recall harness "beeps" good and wires do not appear burnt. also shuffled relays around in central junction box.
Could formerly access OBD2 port with superchips programmer but no access now. fearing the worst, but hoping maybe bad ipr sensor (or another sensor) could cause this. Is it likely or not that this short fried the PCM?
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Ok, so I am trying to get are 99 F550 all fixed up and have a few things to ask.
So we have had the ABS light on now for some time. I had it scanned at O Riley's and the scanner said the abs sensor on the passenger side was faulty. So I replaced that and the light was still on. We had taken the truck to ford to get it checked out for a rear end problem we have been having as some of you may know from a previous post I made.
Well ford said it was the rear sensor on the axle that was causing the abs light to come on. So I replaced that. Still have the abs light on. I disconnected the batteries to try and see if that would reset it and it did not. I hooked up the Scan Gauge II and ran to see if it picked up anything. It said it did not pick up any thing. I still did a code clear but it didn't work. If there a tricky way that you have to get the code cleared off?
2nd I was checking the fluid. I noticed that the tranny fluid is over filled quite a bit. Will this hurt it? Should I drain the fluid to where its at the fill line?
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I have an 08 f250 with 6.4. when ever it rains the truck will not start. None of the gauges will work, door chime doesn't work and the only error light is the airbag light. Lights, radio, turn signals, horn all work. There is no clicking of the starter relay, the truck in dead. There is no water on the floor board nor is the floor moist. If I place a ceramic heater on the driver side floor board and blow hot air towards the firewall the truck will start in about 30 min to an hour depending on how long it sat in the rain. I've removed the air intake vents and there is no debris blocking the drains.
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OK, so I have the brake pedal downshifting, but there is no real exhaust brake. Can I have one installed, like the latter model 2015 or even the 2016, with the button?
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I have a 2008 f-550 diesel. Had water in fuel. Flushed the entire system. Replaced the fuel filters and injectors but still will not start.
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