F250 Speedometer not working.
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Freshman User
Joined: May 2010
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From: Sunshine Coast, Australia
F250 Speedometer not working.
OK I have had my Speedometer give out on me.
I have read a heap of topics on it but they all seem to have other things happening as well as the speedo problem including ABS lights and the like.
My problem is just the speedo not working.
It happened a little while a go so I removed the cluster to see if I could see anything and I also removed the sensor on the rear diff to see if I could find anything there.
I put it all back together after not finding anything unusual and the speedo worked fine for a little while.
It started to jump around a bit while driving then it just stopped all together.
I just replaced the rear sensor and still nothing.
Anyone got any ideas of what I should check for?
I have read a heap of topics on it but they all seem to have other things happening as well as the speedo problem including ABS lights and the like.
My problem is just the speedo not working.
It happened a little while a go so I removed the cluster to see if I could see anything and I also removed the sensor on the rear diff to see if I could find anything there.
I put it all back together after not finding anything unusual and the speedo worked fine for a little while.
It started to jump around a bit while driving then it just stopped all together.
I just replaced the rear sensor and still nothing.
Anyone got any ideas of what I should check for?
Tuned
Joined: Apr 2004
Posts: 425
Likes: 72
From: Aroostook County, Maine
When I was experiencing electrical gremlin issues (due to corroded fuse box bus bars and/or GEM probs - plenty o' material written about this), I had a short period (1 or 2 days only) where my speedometer was flaking out. Since I had bigger fish to fry, I didn't look into it. But once I got the fuse box issue under control, I can say I haven't had the flaky speedo since.
It could be you are seeing early warning signs of upcoming electrical issues. To that end, it wouldn't hurt to track down the primary grounds (firewall and driver's side fender I think captures them all) and remove/clean/reinstall or replace as necessary.
It could be you are seeing early warning signs of upcoming electrical issues. To that end, it wouldn't hurt to track down the primary grounds (firewall and driver's side fender I think captures them all) and remove/clean/reinstall or replace as necessary.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,344
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From: Lake Hartwell, GA
If you messed around with the instrument cluster and it worked for a short period, that is where I would start looking again. You can use a pencil eraser and "gently" clean the contacts on the harness and the ribbon cable to the instrument cluster. Use some spray "electrical contact cleaner" and compressed air to remove any debris the eraser left behind.
I have done this in the past on many types of electronic equipment that was in a harsh environment. More so in my military life than in my civilian life. Although, I did this to the control panel for our oven the other day. The buttons were not working, so I performed the steps above I mentioned and it has been good ever since. There was a small bit of oxidation on the contacts, but it was barely noticeable.
If that doesn't work, let us know and we can see what pinpoint test or troubleshooting procedures the Ford Service Manual may have available.
I have done this in the past on many types of electronic equipment that was in a harsh environment. More so in my military life than in my civilian life. Although, I did this to the control panel for our oven the other day. The buttons were not working, so I performed the steps above I mentioned and it has been good ever since. There was a small bit of oxidation on the contacts, but it was barely noticeable.
If that doesn't work, let us know and we can see what pinpoint test or troubleshooting procedures the Ford Service Manual may have available.
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Freshman User
Joined: May 2010
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From: Sunshine Coast, Australia
Thanks for the replies, I will have another go at pulling out the cluster and giving it a good clean. I will have a look at the fuse box too.
If I find the problem I'll post it here so it might help someone else in the future.
If I find the problem I'll post it here so it might help someone else in the future.
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Freshman User
Joined: May 2010
Posts: 42
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From: Sunshine Coast, Australia
Ok pulled out the cluster and the inside fuse bo
what a fiddly job) and gave the terminals a liberal spray of contact cleaner.
I could see a little bit of green corrosion on the inside of the fuse box under where the two big terminals attach with the 10mm bolts.
It was hard to see but with a bright light and magnifying glass I could see it. I sprayed the fuse box all over and on the insides where I could get it.
Left it sit for a while to drain off the excess Inox then put it all back together.
It's all working as it should once again. Happy days.
I was told years a go by a computer repairer that you can spray Inox on computer Motherboards as it helps with corrosion but is nonconductive so it wont hurt circuit boards.
I have used it on a couple of my computers that have died in the past and they have all come back to life.
what a fiddly job) and gave the terminals a liberal spray of contact cleaner.I could see a little bit of green corrosion on the inside of the fuse box under where the two big terminals attach with the 10mm bolts.
It was hard to see but with a bright light and magnifying glass I could see it. I sprayed the fuse box all over and on the insides where I could get it.
Left it sit for a while to drain off the excess Inox then put it all back together.
It's all working as it should once again. Happy days.
I was told years a go by a computer repairer that you can spray Inox on computer Motherboards as it helps with corrosion but is nonconductive so it wont hurt circuit boards.
I have used it on a couple of my computers that have died in the past and they have all come back to life.
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frodriguez57
1987 - 1996 F150 & Larger F-Series Trucks
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Mar 31, 2004 08:07 PM
