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Old 09-11-2020, 09:29 AM   #1
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Inthe70s's Avatar
Join Date: Sep 2011
Location: Castle Rock, CO
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Speedometer/odometer stopped working

Hi All- I'm looking for some advice: On Labor day I was driving our '97 Aerbus built on the F53 chassis with 460, 36' with tag axle and the speedometer suddenly stopped working. It also has an electronic digital odometer and shut off at the same time. The rest of the mechanical guages are all working. I've read that it could perhaps be a speedometer sensor but I have no idea of where that could be nor do I know if that is a easy or difficult task. It could be something else as well. Has this happened to any of you folks? If so, what was your plan and how was it resolved? Any advise is greatly appreciated. Thank you and have a great weekend!
'74 F350 44K,'79 11' Mitchell Camper, MINT All Original
'79 Mitchell 25' Class C, 460 46K, MINT All Original
'97 Rexhall Aerbus, 60K, 460, F53, MINT All Original
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Old 09-11-2020, 11:44 AM   #2
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If it's convenient to do so, crawl under the RV and check around the transmission. My '94 had a mechanical speedometer and that picked up a reading from the transmission. My speedometer used to bounce around and I found that the cable clamp was loose down there on the tranni. Normally, there's a plastic gear inside a 1/2-3/4" hole into the tranni's gearing that spins the inner cable of your speedometer cable. They wear out and break sometimes, or as in my case, the clamp screw got loose.

Check for wires down there while you're looking around. You might have hit some road debris that pulled on a wire or something too.
'02 Winnebago Journey DL, DSDP, 36' of fun.

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Old 11-19-2020, 10:06 AM   #3
Join Date: Sep 2017
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I know this comes really late, and hopefully you solved this long ago. But for others finding this thread, I had the same thing happen on our 1997 RexAir with similar specs to yours. I found that it was a fuse, replacing that got my gage cluster working again. However, if we were driving in rain, it would sometimes blow the fuse again. Eventually I noticed that one of the running/turn signal lights, specifically the one on the passenger side over the rear axle, was out. I checked and found that the bulb was good, investigated further and found that the tire had rubbed through the wire harness which was strapped to the frame in the wheel well. I took that apart and repaired it, making sure to route it over the frame instead of below it, and my gage problem has been fixed ever since.
So, long story SHORT (see what I did there), it was my driving/signal shorting to ground when wet that was blowing the fuse, thereby causing my speedometer and other gages to fail.
Hopefully this solves at least one other person's issues.
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Old 11-20-2020, 09:04 AM   #4
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Location: Castle Rock, CO
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Thank you questvent for the tip. I did check the fuses and they appeared to be good but I have heard that I should replace them anyway to be sure. That would be great if it was a simple fuse issue. If not, it seems like it could be the psom and I have found a place that seems to be very familiar with the Ford RV speedometer/odometer psom issue for 92-97 years. I can ship them my speedometer and they will make the necessary repairs. I probably wont get to removing the cluster until it warms up here in Colorado but I'm hoping we have a few warm days over the holidays and I can get that handled. I'd like to have it repaired and reinstalled by early spring. I will keep everyone posted! Thanks and happy holidays!
'74 F350 44K,'79 11' Mitchell Camper, MINT All Original
'79 Mitchell 25' Class C, 460 46K, MINT All Original
'97 Rexhall Aerbus, 60K, 460, F53, MINT All Original
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