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Speedometer Going Crazy

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Old Sep 26, 2014 | 09:50 AM
  #1  
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MCPOUSNRET
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From: Jersey Georgia
Speedometer Going Crazy

Speedometer Going Crazy.
2002 Excursion, 5.4, Auto Transmission, 246800 miles.

Put key in ignition and immediately noticed no odometer display. Put it in drive, Odometer began to register but SPEEDOMETER fluctuated wildly. Reading the posts as best as I could, I replaced the VSS sensor on Rear Diff, and no change in symptoms.

Can anyone help me here? i don't want to replace sensors just to replace them. gets costly ( disabled Vet, limited income). I appreciate any help you may offer. Thank you.
 
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Old Sep 27, 2014 | 01:51 PM
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From: Nanuet, NY
Couple ideas here:

speedo not working ?'s - Diesel Forum - TheDieselStop.com
 
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Old Sep 27, 2014 | 01:53 PM
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Also try to disconnect battery, let sit, and reconnect.
 
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Old Sep 28, 2014 | 02:24 PM
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Thanks

Appreciate the input. I'll give it a try
 
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Old Sep 28, 2014 | 05:07 PM
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Have you recently driven in deep water? Or wash your engine bay?
 
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Old Sep 30, 2014 | 04:16 PM
  #6  
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Crazy speedo

No recent driving in water.
Update, took to Ford, they say it's a bad instrument cluster. Sent it off to circuit board medics in Columbia SC
 
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