Sounds like it is a ground problem; check the ground strap that goes from the firewall to the engine block. Most times, the strap mounting bolt is loose or has corrosion and that causes an intermittent ground.I have a 2002 Jeep Liberty and recently my dashboard has been flashing on and off while driving. Everything stops working; gas gauge, speedometer, RPM, mileage, and coolant. I have changed the fuses but that was not the problem. The headlight and haxard lights work properly. Any ideas on what this could be?
I don't have a Liberty but most every Jeep made vehicle has the strap. Good Luck!!