GRT Avionics

All OK. After tracing problem through. Resistors were incorrectly placed on those sensors.

Oil pressure reads 4 without engine running and reads 99 when engine running. We checked grounds, OK. Called GRT and they sent us a loaner EIS box to try. Still same problem. Oil Pressure input doesn't have any programable parameters to set. What could it be? Maybe GRT sent us the wrong sensor? Dave