4x4 not working - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 09-24-2007, 07:28 AM Thread Starter
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4x4 not working

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.
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post #2 of 5 Old 09-24-2007, 01:36 PM
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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.


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post #3 of 5 Old 09-24-2007, 01:41 PM
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Sorry about you troubles, but thank's for letting us know.

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'97 F-350 "FORDOR" 4X4 (Dually Conversion, Shackle Reversal, Technicooler , Auto Meter Gauges, 4" DIY Dual Exhaust w/ '08 tips, 4" DIY intake w/ AEM filter, Wicked Wheel 2, 360 thrust bearing, Homemade E-fuel conversion, Wildman Chip, 160cc DIY injectors , DIY IDM mod) 230K and counting...
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post #4 of 5 Old 09-24-2007, 01:50 PM
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how do you check the motor, will the 4x4 light come on?



On vacation from a truck for a year or...
Looking at 6.4s Moving in a few months then hopefully buying my dream truck!!!

Driving an Audi till then...
but at work I drive
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post #5 of 5 Old 09-26-2007, 01:46 PM Thread Starter
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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.
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