Ford Super Duty (1999-2016) :: 2008 - Message On Dash About Trailer Wiring?
Mar 27, 2014
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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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'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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My 08, when I connect my 7-pin trailer up, bouncing down the road that message and tone CONSTANTLY going off....drives me nuts! I have went thru the wire harness 2x now, cleaned all the contacts, etc. Any other thing short of a 12 gauge? When it does pop on, the controller starts flashing...I've reached down a few times and manually hit the brakes and it still hits em so whatever it is, I feel its very minor or whatever....just don't know where to go now! All contacts have been cleaned good as well.
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I have (2) 2014 f250's both have given the trailer disconnected message randomly from the day they were new. Dealer says everything is with in specification. I just live with it now but something must be wrong with the design. Only does it when no trailer is connected an might be worse when it rains. Might have to hit the ok button every 10 minutes so on bad days.
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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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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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Have a 2008 F-450 that I just got and the trailer light outlet does not work. There is constant power to one pin and nothing on the tail/turn/stop pins. I have checked all of the fuses and relays and they seem to been fine. And yes, I did a search and did not come up with anything.
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Took a trip last week towing the toyhauler. 400 miles one way. 2008 F350 4x4 dually, bone stock, 35,000 miles. On the trip home, as soon as I left campground I started getting a message on the dash- Calibration complete. Would flash and disappear. Then it would flash it again and right after would say "Drive slowly in circle to calibrate". Did this off and on entire way home even after shutting truck off a couple times. I haven't had time to look in the manual yet, what it's for.
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I just traded in my trusty, never had a single issue 2008 Ford F150 with 53k miles for a 2008 Ford F350 with 112k miles. I figured the extra miles were okay, because it is a diesel. I purchased the truck to pull a 31’ 12k lbs when loaded toyhauler, and I have a 14K weight distribution hitch.
Just in case this makes a difference, here is some background information. I have a 2008 Ford F350 XLT 6.4L CrewCab Long Bed. Before purchasing it, I had Ford do a performance and safety inspection. Everything came back clear, so I bought it. The day after purchasing it, I changed all the fluids for peace of mind, ie. rear diff, transfer case, transmission, motor oil & filter, fuel filter, and radiator fluid.
Here is the problem. Occasionally, the 4x4 Low light will start blinking/flashing. Sometimes it will only flash once or twice and go off, other times it will flash for 15-20 seconds and then go off. There is no pattern to when it happens other than it seems to do it mostly when slowing down or breaking. It is very sporadic. I don’t drive very far for work, so I can go an entire week without seeing the light come on, but if I hit the highway for 30-45 minutes, the light will eventually turn on.
When it flashes, occasionally, I get an RPM increase…almost like it’s trying to engage natural or shift into 4x4 low at highway speeds…which causes me concerns. I took it to Ford and after 50 miles of driving it around, they could not get the 4x4 low light to come on. They said they pulled codes but there were none to pull. They reflashed the PCM and charged me $99 to not fix my problem.
I can shift into 4x4 high and 4x4 low (with the window rolled down, I can hear the shifting from 2wd to 4wd high and then to 4wd low and back to 2wd), so I don’t think it is a blown fuse or the control module. I removed and cleaned the wire connectors to the shift motor on the transfer case, and that didn’t fix it. I was thinking about replacing the rear diff abs speed sensor in hopes that will fix it. I think that maybe it’s a wiring issue, which I wouldn’t even know where to start.
I was getting 14 mpg before the reflash and after, I am now getting 8 mpg. Does this seem right? Or is there a learning period after a reflash before my mpg gets back to normal.
Also, the automatic 4x4 drive doesn't work. I don't think its holding a vaccum. I don't think it is related to the 4x4 low light coming on when I am doing normal driving. I can use the lockers to get 4x4 to work correctly. Infact, Ford is the one that told me the auto doesn't work.
Edit: I also noticed that if I flip ON any of the upfitter switches (ie AUX 1, AUX 2, AUX 3, AUX 4) the 4x4 low light will flash constantly until turned off. I currently don't use any of the switches for anything.
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I have a 2010 F250 and wanted to power a dash camera using the upfitter switches. I purchased a 12volt wire, but am unsure on where to wire it so that it will only power up when the ignition is on..
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I have an early 99 F250 that I'm putting 08+ mirrors on. I'm not real sure what year they are, but no wiring diagrams I can find match up. See, my mirrors have 12 wires. All diagrams I find have 10. The colors don't match either. I wanna wire these up but I can't decipher the wiring.
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I have a 2008 f350 6.4 (105,000 miles) and I am randomly getting the check charging system the batterys have a standing voltage of 13.8 and 13.9-14v (read from the ecu with scanner) both at idle and under a load. I also checked the alternator and its making 13.8-14 all the batteries are tight and there is no corrosion.
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Just picked up my F250 a few days ago and it's been great up until yesterday when I hopped in to start her up and nothing. It's a brand new battery and all lights worked, but the dash was dead. I attempted in vain for an hour or so to diagnose as to why this was happening and just happened to open the door with the key in the ignition and hit the door lock button....all of a sudden the truck starts beeping and the message on the dash said "to disable alarm start vehicle". I turned the key, the dash lighted up and away I went. What I may have done to cause this or has it happened to you? I'm thinking it's something with the key fob but not sure.
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This is the third time my TMPS light and "Low Tire Pressure" message have popped on... I have checked all (4) tires and they are still exactly where I had them inflated several weeks back when I went through this the last time. What the threshold pressure is to set the TMPS warning off? I do run about 10psi lower than the door sticker because the door sticker pressure was too much and wearing the center of my rear tires... I just find it odd and frustrating that there are no problems for a period of time, and then all of a sudden I have to go through and over-inflate the tires for a few miles for the TPMS sensors to reset and clear the light, and then drop back down to where I need them for proper tire wear and it seems OK for weeks, and now here we go again
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I'm thinking of doing a dash swap on my 99 super duty to the 2008 super duty dash, steering wheel, etc. I know the od in my truck is mechanical and in the new one its electronical is it possible to swap without having to redue the whole electrical system and computer? Is the steering wheel going to line up and the ducting? How should i approach the wiring?
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My 450 has all power to lights and aux but no dash lights and only the airbag light will illuminate on the dash and the truck won't start there is absolutely any power being transferred to the starter. It only happens after rain or increasing humidity it seems.
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How does the truck know that there is a trailer connected?
With my cab-over camper and no trailer as soon as I go to reverse the back up alarm goes off. I thought I would wire in a marker light to the trailer brake circuit but that didn't do it, maybe not enough resistance? The truck still says no trailer.
How I can fool the system so that when I load the camper it looks like a trailer to the truck?
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Well, it seems the cover on my trailer connector got broken off. The cover locks the trailer plug into the truck side. The connector on the truck is/was supplied by Ford. Now the dealer say NLA, only 2005 and up. Truck is 99 F250 SD. Plug is 4/7 way. Where can I locate a direct plug-in replacement? I do not want to be cutting and splicing.
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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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Not working at plug.
I see there is right turn/stop relay.
Does this relay ever go bad?
All other trailer lights work.
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