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Junior Member
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Discussion Starter #1
i have a 2006 f350 lariat crew cab short box 4x4 diesel the interior lights come on and off intermittently sometimes it doesn't happen form a few days other times it happens when the truck is sitting in the drive way once i pulled the fuzes one at a time till i got the lights to go out then at dark the head lights turned on by themselves any help would be appreciated
 

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Senior Member
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422 Posts
These were my symptoms exactly.
Let me start at the beginning:
About six years ago my speedo would not return to zero. This symptom would come and go. Then, about 3 years ago my security system would trigger spuriously...either in the parking lot at work or at night...I'm sure my neighbors love me, otherwise, I would not be alive anymore. I put the security system into valet mode, because I was afraid if I took it to the dealer to get fixed, they would tell me the car alarm was failing and would convince me to replace it. Good thing I resisted taking it in, as you will see below.
Then, about a year ago I began seeing the interior dome light go on while I was driving. It would turn off again after a minute or 2. I was also hearing clicking, like a relay was picking on and off.
Then, about six months ago my batteries failed after just under 3 years of age. I had them replaced for free under warranty.
So, I tried replacing all the relays one at a time...no luck. The light was on solid at this point.
I started taking out the gauge cluster, since I was convinced it was either the power saver relay or interior lamp relay, both located inside the gauge cluster. I decided, after starting to remove it, to take it to the dealer, for fear of messing up something in the dashboard.
I let them do diagnostics on it and they said the root cause was a short in the gauge cluster. I asked them whether they could fix it and they said they don't troubleshoot to actual cause, but replace the entire gauge cluster with a rebuilt one. So, I let them do it. This cost me a little over $700. I also had another set of symptoms, one of which was the truck would chime after the driver door was opened. They said the cause of this was the 'Timer Spring', which cost a little over $400 to replace (ouch).
Anyway, I hope this helps you.
I did consider doing it myself, so I called Auto Nation (used to be Tousley ford), asking them what they could do. They will sell you a new cluster gauge for about $300-400. If you have a 'chipped' key, they will need you to send them both of them, so they can re-program the cluster. If you don't have a 'chipped' key you just need to tell them the exact mileage, which they will program into the new unit before sending it to you. They also need you to send them your old one, otherwise they will charge you for the core.

Like I say, hope this helps. I know this symptom is a pain to diagnose...if you aren't sure exactly where the problem is, it's not a good idea to start replacing things...it can get costly.

I drove out for $1222 and I'm glad I took it to O'Meara Ford in Denver. Even though I hate with a passion taking to them, they have always been spot on with the solution.

I despise letting anyone work on my vehicles because, many years ago, I've repeatedly picked up my vehicle with more symptoms than when I started.... I'll not bore you with the details.
Sorry for the long discussion, but...

Oh, in summary, all my symptoms are resolved, including the security system.
And, I can finally leave my truck sitting for weeks and it starts just fine....yahoo! Oh, and the rebuild includes a new gauge lens, which looks great...the plastic tends to get scratched a little every time you clean them.
 

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Junior Member
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Discussion Starter #3
bustedknuckles i read your post which your problems and i thought it sounded like the same set of symptoms but you never posted the solution in your thread and i couldn't figure out how to message you for an answer thank you for the response
 

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422 Posts
Sorry, it's a little hard to follow, but, when I said I drove out for $1222, I should have summarized, again what all they did and what each fix resolved. Here it is in a little clearer english.

All symptoms except the chime going off (when opening the driver door) were fixed by replacing the gauge cluster. This includes:
- dome light turning on intermittently (eventually staying on permanently)
- security system triggering spuriously (and intermittently)
- clicking noises like relays picking under the dash (intermittently)
- speedometer not returning to zero intermittently (this could have been a different component than what caused the other symptoms, however, I'm convinced the failing component was located in the gauge cluster).

The symptom of the chime going off when the door was opened was fixed by replacing the timer spring.

Again, sorry it was so hard to follow...some of the symptoms were giving me fits for many years and it took a lot of will power to stay away from the dealer as long as I did. I think if I had taken it to them sooner it would have cost me more, but even worse, I would have been back to them a couple times before they eventually nailed everything down. It also helped to tell them that I only wanted the dome light and chime symptoms fixed. Don't get me wrong, I'm not blaming them for doing a poor diagnosis, since I did all I could to find it and eventually let them run it down to root cause. I just didn't want to start paying someone else to work on it until I had exhausted my own attempts at fixing it. I'm sure I would have eventually found the problem, but, like I said in my earlier post, I wasn't sure I could get the dash back together without breaking something.
 
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