Speed sensor?
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New User
Joined: May 2003
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Speed sensor?
I have read other posts on this subject and thought I had my problem figured out, but NOT. 1994 f-150 4x4 5.8 just out of the blue the speedometer, odometer, cruise control quit. Also the transmission shifts hard, especialy into 2nd. After reading this forum I thought it was the speed sensor in the rear diff. I replaced it this morning and still nothing works. WHAT NOW??
Thanks for any help.
Thanks for any help.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Speed sensor?
Since the odometer quit, it's more likely a power supply problem than a signal loss. Pull the cluster and check the PSOM connector for power & ground according to the wiring diagram in the Haynes manual. If it's OK, your PSOM probably just died.
Junior User
Joined: May 2003
Posts: 64
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From: South of Detroit
Speed sensor?
I have the exact same problem, as of right now FoMoCo is checking my cluster out. If you call a dealer it's 700 bucks for a repalcement 
needless to say I lost my mind and called Ford's customer service to complain..... Nothing came of that. Unless you have a friend at Ford, get on the web and do a search for speedo repairs or cluster service. I found several sites to repair clusters. Let me know if you need the links, email me at scooter670@ameritech.net I will forward them to ya.
needless to say I lost my mind and called Ford's customer service to complain..... Nothing came of that. Unless you have a friend at Ford, get on the web and do a search for speedo repairs or cluster service. I found several sites to repair clusters. Let me know if you need the links, email me at scooter670@ameritech.net I will forward them to ya.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Speed sensor?
A bad PSOM won't affect the ABS. They share the signal from the sensor. And it doesn't "shape" the pulse for the other components - the pulse is generated by the sensor, and that determines its shape. The PSOM performs a frequency shift to output a standard number of pulses per mile (I forget exactly how many) by using the conversion constant.
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New User
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Speed sensor?
Ok, I'll check the wiring first. Not sure how to inspect the toner ring or what I'm looking for. Please be patient with me. thanks again
Rick
Rick
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Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Speed sensor?
Just lift one rear tire (or both), pull the sensor out of the top of the diff, shine a flashlight into the hole, and slowly turn the d-shaft and watch the tiny teeth on the tone ring. If any are missing or if the ring wobbles, you'll have to open the rear cover & pull the axleshafts and carrier to replace it.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Speed sensor?
Contact havack (the webmaster) at http://www.broncodata.com/ . He contacted the mfr. for something, and he may still have the contact info.
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