4x4 not working

[Yella Fevre]

I am posting this information for those of you who have ford 4x4. I recently wrote another thread asking for some help regarding a not functioning 4x4.

Here is what I learned so you can pass on the info.......


I had a 4x4, electronic switch, 7.3 Powerstroke, that would not engage in fwd. What the problem was, was that the shift motor had locked up, as a result burned out my ECM and later my switch. I had to replace the switch, ECM, and shift motor.


May want to pass on that my culprit was the shift motor.

[AvroAero]

The motor is ussually to go first. Nothing yet for me, knock on wood. Good to know trying to use it when it won't work could damage something.

[pipelayerjdh]

Sorry about you troubles, but thank's for letting us know.

[cchase]

how do you check the motor, will the 4x4 light come on?

[Yella Fevre]

No. The light was not coming on. I had to go to the ford techs and hook up to their computer testers. The first time I went there the computer was giving a failed switch and or ECM (electronic control module). I then replaced both and the truck could now "talk" to the computer and tell that I cad a bad motor. During the test, it was checking multiple plates and one plate stayed continuously open. That told my tech the motor was out.