Cadillac Repair: 1989 Cadillac Fleetwood 4.5L FWD, 1989 cadillac fleetwood, cadillac fleetwood

Question
Digital display for fuel and heating controls have no display other than a C or D. Intermittently the display will pop up and show the fuel level and controls for heating.  Also, the dash will flash and you can hear a relay coming on and off as the dash flashes.  Any ideas on how to repair this problem?


Answer
If you are saying that you DO see a -c or a -d according to your statement above, Then you need to perform simple test procedures on the computer inputs and outputs to make sure you do not have any short circuits and if you do NOT have any short circuits, you need to replace the computer.

You stated: Digital display for fuel and heating controls have no display OTHER THAN a C or D.