Could the ground to the pump and level controller be missing. Been awhile but seems to me the black ground wire goes to the frame. Trace it out, remove it, clean the ring on the end, scrape the paint where it terminates on the frame, and tighten the the bolt holding it to the frame. IRRC there is a star washer between the eyelet and the frame.
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2006 3000RK
2009 Ram 2500
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