1990chevyg30motorhome

Was driving the other day, hit a bump and my coolant gauge basically shifted. The gauge shifted 90 degrees and instead of reading from 10 o'clock to 2 o'clock, it starts at 3 o'clock and still moves as engine becomes hot. Anyone have a solution for this. Want to fix myself, just not sure if adding an aftermarket temp gauge is the only way to fix without buying a new gauges.

canucklehead

Could be an issue with the connection at the back of the gauge panel. You could pick up a cheap aftermarket gauge and test the wire going to the cluster.....