Mark K, I feel your frustration.

 

Good news: BOTH fuses are GOOD ...oops

Bad news: Mystery continues.... speedo at zero, odo blank, slow jerky shifting

So Now what: BAD PSOM??? ...or could it still be the sensor on top of the diff?? PCM??

 

It is not the PCM. Nothing the PCM does will affect the speedo or odo. Nothing the VSS does or does not do can make the odo blank. It's the PSOM.

 

Drats...

Is PSOM easy to get too? -- looks like I have to go through the face of the dash, not from underneath/front.

 

You just take the cluster all apart and remove the PSOM.

The PSOM:
Attachment 280340

You might want watch these videos:

https://www.youtube.com/watch?v=cOxzu0uw1l8/

 

Thanks for all the replies to my questions--- I have since replaced the PSOM with a used ebay unit, and the van is shifting fine, and the speedo works too.

 

I installed LED tail lights IPCW® - Chrome/Red LED Tail Lights ordered from CARID.com and overdrive light started flashing at night when tail lights were on. driving during the day I have no issue. Of course when overdrive light flashes transmission shifts hard.

 

I had the same issue years ago with a 95 E150. Somewhere i read that the cause of a non functioning PSOM is doing too many tire replacements with different diameter tires. Must have been true as i was on about the fifth change, experimenting with different tire/wheel combos. The article i read said the PSOM was good for 4 changes

 

baddad457,
There is no wiring between the tail lamps and the PSOM.
A PSOM has 6 changes and not 4.
The changes can be reset to 6 if you know how.
A PSOM out of changes will not stop functioning, it will only use the last setting.

 

It won't ? Mine did. Speedometer went ape**** because of it.

 

baddad457,
"WHERE DID I SAY IT DID ?"
I took your post as response in post #23 as a response to the post in post #22.
I think you had other problems, maybe a bad PSOM if the "Speedometer went ape".

 

Just repeating hearsay here. There was a post in the Bronco subforum that warned me not to put LED bulbs in the tail lights on my '95 Bronco because they would cause the torque converter in the E4OD to stop locking up.

Again, I am just repeating what I read. I don't know if it is true or not.