Hi. First of all, my biggest problem is to describe my problem i english

My car is a 626 -91 and, yesterday my rev counter stop working. At the same time there was more functions wish went out. The controllamps for handbrake, oilpressure, water temp gauge and batterycharge. The cruisecontrol stop working too.
The engine and all lights outside the car works fine.

Sounds to me like some earthproblem but as i don't have any wiringdiagram, i have not be able to find the common earthpoint for these functions.
Or, is this some wellknown problems on 626.

I'm open for any ideas.

/Tomas