speed sensor
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Junior User
Joined: Mar 2004
Posts: 57
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From: Columbia
speed sensor
94, F150 4.9L 6 cylinder Just this morning the speedometer quit working and the transmission started acting strange, such as down shifting at odd times and very slow to shift. Could this be the speed sensor. The local Advance auto guy suggested it.
Where is the speed sensor located on a 94 F150 6 cylinder?
Where is the speed sensor located on a 94 F150 6 cylinder?
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Yes it's ontop of the rear differential, 1 bolt will remove it, chances are it's not actually the sensor. It's a very simple design and kind of hard for it to fail. Clean the magnet off, check the wiring for corrosion. This signal from the sensor is a pulse signal, and any interuption in that signal will cause problems. Your tranny issue is from lack of a speedometer. Do a search under "bad PSOM" too..you'll find a lot of info on this topic.
Freshman User
Joined: Oct 2003
Posts: 45
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From: The Iron Range of Minneso
I don't want to sound like I'm stepping on toes. But isn't the sensor on the rear diff. for the RABS? If so, the only thing that would happen if it was faulty is the RABS would not work and the ABS light would stay on.
Post Fiend
Joined: Oct 2003
Posts: 6,214
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From: New Jersey
Originally posted by brrossi
I don't want to sound like I'm stepping on toes. But isn't the sensor on the rear diff. for the RABS? If so, the only thing that would happen if it was faulty is the RABS would not work and the ABS light would stay on.
I don't want to sound like I'm stepping on toes. But isn't the sensor on the rear diff. for the RABS? If so, the only thing that would happen if it was faulty is the RABS would not work and the ABS light would stay on.
The light green/black (or light green/yel) wire is the ground wire, the other is the signal wire.
The wiring under the truck will be light green/black and red/pink.
Off the cluster, the gray/black wire feeds the ECM on pin 3, as well as the cruise control servo module.
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Originally posted by brrossi
I don't want to sound like I'm stepping on toes. But isn't the sensor on the rear diff. for the RABS? If so, the only thing that would happen if it was faulty is the RABS would not work and the ABS light would stay on.
I don't want to sound like I'm stepping on toes. But isn't the sensor on the rear diff. for the RABS? If so, the only thing that would happen if it was faulty is the RABS would not work and the ABS light would stay on.
We incourage this kind of comment..so don't feel shy or hesitant...
The RABS sensor was used from 87-91, and the speed sensor came off the tranny on these models. In 92 ford went to the Programable Speedometer/Odometer Module (PSOM) until 96 (and 97 superduties).
That RABS sensor for the 87-91 trucks was converted into a RABS sensor and speed sensor...and they ditched the sensor in the tranny.
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Speed sensor success
Posting Guru
Joined: Mar 2003
Posts: 1,311
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From: Quispamsis, N.B, Canada
If I had axles from a 1989 f150 would there be anyway to swap them in and still make the speedo work? Can the wires from the rear end be put into the wires from the tranny?
Basically I'd be taking '89 axles and puting them into a '94 w/m5od. Any way to do it?
Basically I'd be taking '89 axles and puting them into a '94 w/m5od. Any way to do it?
