I found the problem. One of the printed circuits on the back of the instrument panel burned through located between the oil pressure guage and the turn signal bulb. Looks like a ground circuit.
I recall that when I had removed the instrument panel to check the screws and bulbs, I got a spark off the hot clock wire. That probably burnt the ground on the oil pressure ground circuit.
With the luck of the Irish I managed to solder a thin wire across the gap in the circuit.
Works like a champ now!
1993 190E 2.3
2000 Toyota 4x4 Tundra