1992 400E, 229K miles. While engine is running all my instrument gauge needles sit at zero and ABS and ASR lights are both on. Also, there is a buzzing that sounds like the door buzzer but very muted. Cruise also doesn't work, which was working before.

Happened after I came out from the store and started the car.

Neither of the two engine harnesses have been replaced but there is no exposed wiring either.

I'm guessing its a problem with ground.

Car runs just fine. But I might be doing 100+ mph, on fumes, at 8000 rpms, and boiling over and ready to explode...and without the "idiot lights" who would ever know?!

Any suggestions?