weird speedometer update
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New User
Joined: Dec 2005
Posts: 6
Likes: 0
weird speedometer update
Thanks for the replies. I have changed the sensor on the rear end, the sensor on the tranny, tried another speedo with no change the speedo still bouncing and the o/d light is flashing. I also checked my speedo on another truck and is working perfectly. So i'm perplexe now. Where is the problem? From the PCM? The wiring? NEED MORE HELP . THANKS GUYS
E-150 1999 V-6 4.2L (analog speedo and odo)
E-150 1999 V-6 4.2L (analog speedo and odo)
Posting Guru
Joined: May 2003
Posts: 1,525
Likes: 3
O/D light flashing indicates there is a code in the processor. Retreive the code and see if that gives you a clue to the problem. Was the sensor in the rear end damaged physically? If so you may have some missing teeth on the reluctor that may give you a poor signal to the speedometer and pcm.
Lead Driver
Joined: Feb 2003
Posts: 8,140
Likes: 4
From: Oak Harbor, OH
Pull the codes, the transmission has stored a code. You need to see what it is. It's possible that just have a bad ground, check your battery cables and make sure that you have a good ground to the frame, engine, and body.
