1992 Ford E-Series Van vehicle speed sensor issue?

MACKDURANGO

MEMBER
1992 FORD E-SERIES VAN
5.0L
V8
RWD
AUTOMATIC

I bought this conversion van in pretty good shape. I was told they had a shop verify it needed a vehicle speed sensor. I bought one that auto parts store shows for this van that mounts on transmission at end of speedometer cable, but no such thing on the tranny and no cable anywhere. I then read that for 92-96 they don't have on it uses the signal from the ABS sensor on the differential, so replaced that but no change. It has no speedometer/odometer, idle races and is inconstant, accelerates hard and shifting is off. What else should I be looking at?

5 Replies

HMAC300

MECHANIC
48,601 POSTS

This shold be scanned for codes first it may be your programmable speedometer/odometer module. You don't have a speed sensor the module is on left hand side of dash.

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Sunday, March 8th, 2015 AT 1:45 PM

MACKDURANGO

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5 POSTS

I don't have any abs light or others coming on so would a scan show anything? Isn't the psom on the back of the speedometer/odometer? I don't get anything on the speedometer and no odometer display. Already checked fuses. Was thinking I should test wire harness to psom for voltage.

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Sunday, March 8th, 2015 AT 7:58 PM

HMAC300

MECHANIC
48,601 POSTS

The trouble is that that is an obd1 setup and you need a mechanic that still has a scanner for OBD1 you can check for voltage going in and out. But not sure that is going to let you know if it's good or not. I'm sending a pic of the psom and you wan tot see if you have voltage coming in from speed sensor, out to sensor then ground as well. And check other wire to amplifier as the amplifier may be the problem if you have one. It says this is on lh side of dash. Also check your power on both fuses as one is battery and other is key on

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Monday, March 9th, 2015 AT 7:18 AM

MACKDURANGO

MEMBER
5 POSTS

I verified I had power and increasing signal to psom, so I replaced with used speedometer. Now the speedometer and odometer are working, but idle and shifting is still the same. I also notice a clicking sound coming from behind passenger side firewall and a occasional pull to the right while driving. Could it be the 4wabs module? What else could cause symptoms? I also notice there is no horn. I have checked fuses. Can a mechanic with obd1 see where the problem is? Is it rare to find someone who has one? I asked one mechanic and they have nothing for later than 96.

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Sunday, March 15th, 2015 AT 10:03 AM

HMAC300

MECHANIC
48,601 POSTS

Ya it 's kind of hard to find someone with a obd1 scanner if someone has a tech 1 they may be able to check it if they have an adapter for a ford. As far as pulling to right it can be a frozen caliper, out of alignment or front end suspension problem. You might check with a ford dealer to see if they have one. The clicking could be a wheel bearing but a bunch of things so have a local pro look at that. Best thing for trans is have a trans guy look at it. He may be able to self scan for codes to see if it's an electrical problem or not.