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Mopar Certified
Mopar Certified, Dodge Technician
Category: Dodge
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Experience:  24 Year Chrysler/Dodge Certified Specialist
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Dodge RAM 2500 4x4 My 4 wheel drive is not working... I did

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My 4 wheel drive is not working... I did get it to work last Nov when I cralwed under and wiggled some wires and stuff, but now it is not working at all.
Welcome to Just Answer Dodge my name is Mark. Please, realize that all my answers are based solely on the info you provide me......

The 4x4 is vacuum actuated, so the first step is to see if there is vacuum getting to the vacuum switch on the top of the transfer case.

If there is vacuum getting to the switch, then you need to see if there is vacuum getting to the shift motor on the front axle. Quite often these switches will stick and not send vacuum to the front axle to engage the shafts.
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