Ok, I'm on the freeway today, doing 70ish, and I noticed my ScanGuage is blank. I push the lower button and it comes right back on. Then a few miles later it does it again but this time my speedomoter drops to 0 also. The odometer and trip meter don't function either. I push the lower botton on the SG again and everything comes back. It did this a third time, then ran fine over the next 50 miles.

Any gusses as to what I should start checking?