jeep99899

I have 98 Pathfinder, this recently started happening. Turn the key on, instrument panel freaks out. Temp gauge maxes out, gas gauge maxs out. RPM bounces, speedometer has bad reading (when started(usually stays at or around 10-15 MPH) The odometer says 9999999. I will drive the car for a period of time and at times it is ok, other times has same issue. Any thoughts would be appreciated.

jeep99899

I think I know what is causing it, I however do not know where to find the ground for the instr panel. Does anyone know specifically where the groud is? If I look at the schmatic, I can see all the items causing issues share the same ground.