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4wd problems

Old 05-03-2018, 12:09 AM
Luis Dominguez
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4wd problems

Iíve been trying to troubleshoot why my 4wd isnít working and this is what Iíve found but cant seem to figure out the exact problem.

-when i turn the **** from 2wd to 4hi or 4lo, I hear the clicking from the module

-when I turn the ****, the 4hi and 4lo light comes on the dash

With those two things working, I know itís not a relay or the module


- I can spin the front driveshaft by hand when itís NOT in 4hi or 4lo. But I CANT spin it myself, when I turn the **** to 4hi or 4lo.

- Does this mean itís NOT the transfer case motor? If the front driveshaft is activated when I activate the 4wd? Could it possibly be something wrong with my hubs? They are automatic hubs, not manual.

Does my ford have pulse vacuum hubs?
Old 06-13-2018, 08:58 PM
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What year is your truck? The 99 and 00 had the vacuum hubs and that sound like your problem, the hubs aren't engaging.
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