gauges go off when I hit a bump in the road
 

This is my first post. I have a 2001 Dodge diesel Cummins. I have a problem with my gauges going off. It started out some of the gauges would stop working out of the clear blue, but now when I hit a bump in the
road, all of them stop working. If I hit another bump they all might come back on. I need to know what I should check to see what's going on. Appreciate your advice.