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Loose Wiring Harness (Speedo and Odo not working)

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Old 10-19-2015, 02:47 PM
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Default Loose Wiring Harness (Speedo and Odo not working)

Hello everyone. New here, and as my truck is beginning to have issues I guess I'll be here often. I was wiring up a CB radio and seem to have disconnected a wiring harness and now I have absolutely no idea where the hell it goes. I can not find the other end of it to save my life. Anyone know where the connection for this harness is? And also does anyone know what these wires are for? Because now my speedometer and odometer are not working, Rear ABS light is on and I'm shifting poorly. I hope it is this harness and not that I shorted something but I can't find any blown fuses. Please help, much appreciated!








Same Harness just with flash. The first is better to see colors.
Old 10-19-2015, 02:51 PM
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Are your interior lights working?

If not check your fuses, the same one is used for interior lights as for the PSOM, stupidest thing ford has ever done IMHO
Old 10-19-2015, 02:54 PM
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Also there is a connector that is usually in the middle of the cab, under the ash tray (basically) that is there for connecting trailer brake controller, first time I saw it I freaked because nothing was plugged into it and couldn't find another connector anywhere close.
Old 10-19-2015, 02:55 PM
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Originally Posted by fltdriver
Are your interior lights working?

If not check your fuses, the same one is used for interior lights as for the PSOM, stupidest thing ford has ever done IMHO
Hey, thanks for the reply. The lights are all working. I've checked fuses and as far as I can tell by sight they're all good. Can't quite figure out the multimeter I have lol. But I have a feeling it's gotta be this harness and I just can't find it's home. It's weird because I don't even remember pulling it but the wires seem to go up into the cluster area. I don't know.
Old 10-19-2015, 02:56 PM
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Originally Posted by fltdriver
Also there is a connector that is usually in the middle of the cab, under the ash tray (basically) that is there for connecting trailer brake controller, first time I saw it I freaked because nothing was plugged into it and couldn't find another connector anywhere close.
Yup I've got that one too. I wondered what it was.
Old 10-19-2015, 02:57 PM
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That could be the harness for plugging a trailer brake controller into. It's usually just behind the front edge of the dash pretty much just below the power point plug beside the ashtray.
And what fltdriver said about the interior light and odometer on the same fuse.
Old 10-19-2015, 03:03 PM
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Originally Posted by Chris_1
That could be the harness for plugging a trailer brake controller into. It's usually just behind the front edge of the dash pretty much just below the power point plug beside the ashtray.
And what fltdriver said about the interior light and odometer on the same fuse.
Yup but fuses are good and I've found the Trailer brake controller. It's still where it is supposed to be under the Power Point. This harness is something different. I'm lost. Been looking for the connection all morning. I appreciate the replies.
Old 10-19-2015, 03:03 PM
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Could it be for the buzzer (chime) and it's been removed ?
Old 10-19-2015, 03:15 PM
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Originally Posted by Chris_1
Could it be for the buzzer (chime) and it's been removed ?
Quite possibly because since I've had the truck I haven't had a buzzer/chime. So then the question is what the hell happened while hooking up the CB that made the speedo/odo/abs stop working? I first tried to wire it to the ignition as that is what the guy at the car stereo place said would be best and easiest. But that started acting weird as soon as I tried to start the truck so I took the cb off of that and wired it to what used to go to the cig lighter. But ever since then that stuff stopped working. The lights on the cluster and the other gauges are still working. But like I said now I am shifting hard and the ABS light is on as well.
Old 10-19-2015, 04:02 PM
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Found the problem. Thanks everyone.


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