I'm stumped on the rear wiper and washer motor. I now have 3 motors that I can jump off/hot wire and they run...but they won't run installed in the car.

1. I've removed and cleaned all the switches, tested, they work.

2. put in a different relay, the one in the wagon door, I can hear it click, it is getting juice at least...how would you test it?

3. Cleaned, relubed all the motors, all 3 run smooth and easy when hot wired

4. I can jump wire and squirt the rear washer pump..but again, not in the car

This is starting to sound like a relay....again.

Is there another relay somewhere else on the wagons? There are 2 up under the hood in the black plastic box...what do they do??

Anybody have the MB manual on testing the system?

Any ideas at all??

__________________
Mark
1983 300TD Wagon
Even a broken watch is right twice a day