E34 wipers problem

[shiftfan]

Hello!
It all began when i wanted to see if my window washer pump works, and suddenly a fuse "died".I replaced it , and the wipers worked only on first , and last speed.At that time i thought it must be a relay and i put the problem on hold.I had some kind of a phone electrical system running through the car , which i wanted to get rid of, and after that the brake lights ,parking lights, wipers and side mirrors stopped working.I pushed a connector left side under the steering wheel the parking lights started to work, the electrical mirrors too, but i think in reverse,...anyway regarding the wipers....

I checked :
the wiper motor and it's k
all the fuses are k (including the second power box too)
the relays related to the wipers and they seam to be k. (2 yellow relays near the second power distribution box under LH of rear seat)
wiper switch in the steering and it's k
-btw i have a m50b20 from 91
Sorry for my bad english.

Please help .Thank you.