2006 dodge 2500 diesel ram 4 wheel drive wont work nor light on the dash.?

William H

New member
My truck came with no manuals and i am unsure on the electric 4 wheel drive engagement procedures. Mine wont work and light never comes on when i switch the knob to 4 lock. Can anyone shed some light on the proper shifting.
Also i have a whomping noise when i lay on the throttle or pulling a trailer? any answers?
 
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