four times in the past 1 1/2 years I've lost power in mydash. All gauges, tach & speedometer go dead. the light in odometer reads "NO BUS". Once a mechanic looked and wiggled connections under hood and fixed it. Next time I'm cruising on highway and it hapens--momentarily , bell rings and dash comes on. next time get in start engine and dash goes dead. I push in clutch and dash comes on. we leave and going down highway dash goes dead. I push in clutch- nothing. frustated I bang on top of dash --dash comes back on. Engine runs fine but no tach, speedo or any other gauges. any ideas from anyone??