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94 speedo problem.

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Old Oct 30, 2007 | 05:03 PM
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94 speedo problem.

Have a 94 2wd, auto, 5.0 litre. Have to get it state inspected and the only thing left I have is the speedo, it doesn't work. The digital odometer is inop as well. The tach, and other gauges work, just the speedo and odometer.

I have not gotten down to the tranny to check it out yet but any ideas?

Thanks in advance,

Ron
 
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Old Oct 30, 2007 | 05:07 PM
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From: Easton,Ks
How does it shift, OK or hard?
Check the VSS/ABS sensor and wiring in the top center of the rear end.
Also check all of the fuses.
 
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Old Oct 30, 2007 | 05:21 PM
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There is a ABS sensor light on. Seems to shift ok.
 
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Old Oct 30, 2007 | 05:30 PM
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So if I have a ABS light on, and the speedo is fed through the speed sensor, so thats why no speedo? If I correct the ABS problem then my speedo should be ok?
 
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Old Oct 30, 2007 | 05:32 PM
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From: Easton,Ks
Still check the VSS/ABS sensor in the top center of the rear end and its wiring.
Also check all of the fuses.
 

Last edited by subford; Oct 30, 2007 at 05:36 PM.
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Old Oct 30, 2007 | 05:33 PM
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Actually the truck is one of my kids buddies, so thats why I'm not 100% sure of all of the symptoms. He just said it does shift weird sometimes and he has a check engine light sometimes. I thought it was the ABS, so Im having him double check.
 

Last edited by jetdoc3037; Oct 30, 2007 at 05:35 PM.
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Old Oct 30, 2007 | 05:35 PM
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From: Easton,Ks
If it is not the sensor, fuses or wiring then the PSOM is bad.
 
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Old Oct 30, 2007 | 05:36 PM
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He verified its a check engine light, not ABS...whats a PSOM?
 
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Old Oct 30, 2007 | 05:39 PM
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From: Easton,Ks
Originally Posted by jetdoc3037
He verified its a check engine light, not ABS...whats a PSOM?
PSOM - Programmable Speedometer/Odometer Module
It is right behind the speedometer mounted on the cluster.

/
 
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Old Oct 30, 2007 | 05:42 PM
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Subford, you've been a lot of help, thanks. This kid lives with his mom and his dad left them a long time ago, so he doesn't have a lot of extra money. He for sure has a VSS and not cable then? So the first and easiest to check is fuses, then the VSS on the rear, either the sensor itself or wires, then the PSOM?

Again thanks friend, good Karma to you.
 
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Old Oct 30, 2007 | 05:44 PM
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From: Easton,Ks
Originally Posted by jetdoc3037
Subford, you've been a lot of help, thanks. This kid lives with his mom and his dad left them a long time ago, so he doesn't have a lot of extra money. He for sure has a VSS and not cable then? So the first and easiest to check is fuses, then the VSS on the rear, either the sensor itself or wires, then the PSOM?

Again thanks friend, good Karma to you.
Yes that is right.
 
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Old Oct 30, 2007 | 05:58 PM
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One more thing Subford, does the 94 have a VSS or ABS sensor?
 
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Old Oct 30, 2007 | 06:19 PM
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From: Easton,Ks
Originally Posted by jetdoc3037
One more thing Subford, does the 94 have a VSS or ABS sensor?
Some diagrams call it a VSS and some an ABS.
Most auto parts stores call it an ABS but I think most Ford dealers call it a VSS sensor.
Some auto parts stores will try to sell the one for the transmission that is the wrong one.

 
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Old Oct 30, 2007 | 06:24 PM
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You're the man, pictures included!! lol, really thanks though. I just called a auto parts store and they are about 15.00 or so, thats not bad at all. We will go through the troubleshooting you suggested and if we have to get one I will make sure he says its not the one for the tranny, again thanks friend.

Ron
 
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Old Oct 30, 2007 | 06:29 PM
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From: Easton,Ks
One other note some times you can get by taking the VSS/ABS sensor out and wiping off the junk and putting it back in. This would also say that you need to change the oil in the rear end.
 
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