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Old 08-29-2019, 07:55 AM   #1
Restorium
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Default Speedometer and Transmission Quit

Went for a drive this morning. While driving down the highway the speedometer went to zero mph and the transmission free wheeled. Watched as I pressed the gas and the RPM went up but the trans acted like it was in neutral.
Did that for less than one minute and went back to normal.

After reading on the internet I think it might be a connection problem to the module above the rear differential.

I will check it out later and see what kind of evidence I can gather.
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Old 09-05-2019, 07:06 AM   #2
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Found a corroded wiring connection. Went for a long drive and everything seems fine now.
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Old 09-08-2019, 11:43 AM   #3
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Default Thanks for the info

Thanks for the info. Have not had this problem yet, but nice to hear about this fix.


QUOTE=Restorium;29147]Went for a drive this morning. While driving down the highway the speedometer went to zero mph and the transmission free
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Old 09-08-2019, 12:34 PM   #4
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Default PLEASE tell me where you found corrosion.

I have been trying to get the speedometer working again on my 2002 Sun Voyager for a very long time with no success. I have brought it to 3 different shops and sent the speedometer out for repair (they told me the speedometer works fine) The 2002 does not have the pickup sensor in the differential like other years. I'm told it gets the info from the wheel sensors. So I have replaced all of those with no luck. I'm at a total loss and have resorted to using a GPS speedometer, but would like to get it working again. Not to mention having an odometer.
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Old 09-08-2019, 01:44 PM   #5
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Originally Posted by Ken & De View Post
I have been trying to get the speedometer working again on my 2002 Sun Voyager for a very long time with no success. I have brought it to 3 different shops and sent the speedometer out for repair (they told me the speedometer works fine) The 2002 does not have the pickup sensor in the differential like other years. I'm told it gets the info from the wheel sensors. So I have replaced all of those with no luck. I'm at a total loss and have resorted to using a GPS speedometer, but would like to get it working again. Not to mention having an odometer.



Is it a Ford (Spartan) coach or a Workhorse with the 8.1 ltr Chevy?


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Old 09-08-2019, 02:23 PM   #6
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Thanks for the info. Have not had this problem yet, but nice to hear about this fix.


QUOTE=Restorium;29147]Went for a drive this morning. While driving down the highway the speedometer went to zero mph and the transmission free
After I researched it a little I figured out it was either a fuse or the connection on the module. Since it only quit for less than a minute and went back to normal it had to be the connection. Took off the connector and there was a very small amount of corrosion on one pin. Cleaned up the connector and I have driven it a few hundred miles now without any trouble.
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Old 09-08-2019, 05:57 PM   #7
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I have a problem ,every time it rains my speedometer goes to zero tried liquid tape on the connection at the sensor at the rear of the transmission now I get no speedometer,and a bell alarm that my lights are on and the key is off ,the key is on and the GPS said I was doing 55mph I cann't say too much for this Ford.any ideas?
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Old 09-08-2019, 06:39 PM   #8
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I have a problem ,every time it rains my speedometer goes to zero tried liquid tape on the connection at the sensor at the rear of the transmission now I get no speedometer,and a bell alarm that my lights are on and the key is off ,the key is on and the GPS said I was doing 55mph I cann't say too much for this Ford.any ideas?

I would take the tape off of the plug. Go get some Di-Electric compound (DOW 4 compound). It looks like Vaseline but is non conductive. I'm not sure of the spelling. It is pricey. I use it in stubborn connections. It keeps water out and does not short out signals and voltages. As far as I am concerned tape just holds moisture that is going to penetrate anyway. Some electrical connection contact cleaner spray can't hurt either.



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Old 09-09-2019, 06:31 AM   #9
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Is it a Ford (Spartan) coach or a Workhorse with the 8.1 ltr Chevy?


Sudsy
Mine is a Ford F53 chassis
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Old 09-09-2019, 06:41 AM   #10
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Mine is a Ford F53 chassis
I would take it in to a really good transmission repair facility.

If they can't diagnose it then they will refer you to a really good electronic repair facility. Between the two they should be able to fix it.
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