I've just purchased a '92 740 Turbo Wagon, which had an ABS light and a Bulb-out light illuminated. The ABS light I've seen before, and was attributing it to a dirty sensor. No Bulbs are out, but the connections are somewhat corroded, so I figured that might have been the problem there.

On my way to work today, both of those fault lights went OFF, and at the same time, the OD-off light (the arrow) came ON!! The OD-off light didn't go away when I pressed the OD button, and the car shifted through 4 gears just fine.

2 minutes later, the fault lights switched back, and I am back to square one with the ABS and Bulb-out lights on.

Is there a ground connection somewhere I should be looking at, or could this be a problem with the wiring behind the cluster? Maybe it's just gremlins...