I have a 90 sierra 2.0L non-cos. Recently my tach, gas and temp gauges stopped working. Dash lights work fine and speedo still works but I'm getting no readings from the other gauges. I have check all the fuses I could think of so far and all are good. Any ideas what could cause this? A relay of some sorts? Thanks

 

I would very carefully examine the track(circuit) on the rear of the clocks for a break .
tabetha