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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

VSS Issue

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Old Apr 3, 2016 | 08:15 PM
  #1  
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slashfan7964
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Fleet Mechanic
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From: Indian Falls, New York
VSS Issue

So I've been having an issue with my truck, speedo keeps going wild and trans E4OD shifting rough. No OD light, CEL or ABS light. I replaced the VSS and the connector, no dice.speedo still going ape crazy,and it couldn't decide what gear it wanted to be in. The Odometer still works.

So I disconnected the connector and of course now the speedo quits working. The trans no longer jumps.out of gear but shifts hard. It reminds me of when the dome lught/odo/speedo fuse went out.

I'm feeling like there's a short somewhere and the PSOM isn't bad. Any help? I'm lost.
 
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Old Apr 3, 2016 | 08:25 PM
  #2  
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FORDF250HDXLT
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From: Mi'kma'ki
https://www.ford-trucks.com/forums/1...s-but-why.html
 
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Old Apr 3, 2016 | 08:40 PM
  #3  
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slashfan7964
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Fleet Mechanic
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From: Indian Falls, New York
So I take it you are fairly confident it is the PSOM them? I just didn't wanna have to tear into the dash again lol
 
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