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Old 09-08-2013, 04:40 PM   #1
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Speedometer and Rough Road

While traveling on an extremely rough road yesterday in our Pace Arrow Vision motorhome, I hit a horrible bump that caused my speedometer to drop to 0 MPH, the check engine light came on, but my RPMs stayed constant. The engine is a 2000 Ford Triton V10. Has this happened to anyone else? I'm hoping that the speedometer is electronic and it's nothing too serious, since we recently had to replace a blown out plug ... yeah, gotta love this engine (NOT!!).

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Old 09-08-2013, 05:12 PM   #2
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Just a wild guess with what little amount of info here. Clean all the battery connections and see if that does not help it. If the bump shook the battery connections, it may be they are dirty/corroded and not making like they should.
I have this pet theory that a large percentage of MH troubles come from poor electrical contacts. Even my wonderful Allison transmission is dependent of good contacts

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Old 09-08-2013, 09:22 PM   #3
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loss of speedo and check engine light appearing at same time...would make me look for the speed sensor on the trans...possibly it became disconnected due to the bump
96 Dynasty 36' that does NOT wander, thanks to RuppParts.com and their superior "poly" suspension bushings
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Old 09-10-2013, 08:53 PM   #4
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Loss of Speedometer Reading

I seem to be sensor-challenged, so speed sensor makes sense ... On my Dodge truck I lost the fuel sensor gauge, and then the oil pressure sensor gauge ... all on the same trip. I have a call into Ford to see what they think. Never lost my RMPs, but watching my speedometer drop to "0" in heavy traffic certainly increased my blood pressure/respiration.
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Old 09-10-2013, 08:55 PM   #5
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I agree it's probably electrical, but I never lost my RPMs and the battery light never came on.
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Old 09-11-2013, 06:07 AM   #6
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Most of our RV's are totally dependent on the computer, which controls speedometer, transmission, and countless other things. ANY electrical connection can cause the symptoms you described. May never happen again, but if it does start checking those many connectors!
'99 Allegro Bus '05 Honda CRV
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Old 09-13-2013, 10:37 PM   #7
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I would check the output shaft speed sensor located on the rear of the transmission. It's where the computer gets the data for the speedometer.

BTW.... Without it working your abs may not respond right, I would check it ASAP.

Shaun & Jarese - Denver Co
3 Kids, Nicholas 16, Alex 13, Cassie 9 Years
Newmar AllStar 3950 (mid-engine diesel)
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Old 09-17-2013, 06:58 PM   #8
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We were on the Dempster Highway up in the Yukon, on the way to Inuvik, NWT, this past summer, and lost our dash around the Arctic Circle. All electrics, meters, etc gone. Found the connector in the fuse panel (roadside fuse panel, below driver) worked loose. Pushed it back in firmly, and the dash came back.

Jay & Jo Couture Livin' On The Edge,
w/Dawson, our mini aussie, in a 2007 Monaco Knight 40DFT, towing a 24' Pace "garage"
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