The wiper on my car was out when i bought it (got it cheaper
). Fixed it, this is what i did.
1. Removed the the linkage from the car. Somwhat of a fiddle but i slidd it out sideways kind of.
what happened now was that a discovered that somtime in the past, someone, had removed the linkage and the wiper motor, but lost the cover for the circutboard.
Then solved this by... using a plastic stripe to hold the board in place and just disregard the fact that the circutboard was now in contact with the enviroments.
2. Disconnected the motor from the linkage and then reconnected it to the car to confirm, and yes, it was dead.
3. Since i had the linkage out i greased them upp anyway. First removed, gresed and reconnected all the plastic joints from/to the metalballs. Then removed the actual shafts that transfers the force to the wipers (was one lockingring, a washer and a gasket). Here it was some corrotion.
Fixed this by gently sanding the shafts and using a steel cylinder brush mounted on a drill in the pipes for the shafts. Used a standard steelbrushdisk for a drill to remove other corrotion on linkage.
Observed that there is some holes in the linkage at this shafts that might make it possible to grease them up, still mounted in the car. Removed the central shaft to and regreased.
4. On to the motor.
Removed the circutboard from the motor and cleaned it with some alcohol. The board is to 99% covered in some sort of rubber compound to make it resistant to moisture.
Now i took my magnifyingglas and carfully inspected the board for faults. I found two places where i suspected that the moist had penetrated. This was on the backside, where the central IC is soldered and where the two biggest resistors is soldered.
At the resistors a actualy could see greenich, coppercorrotion. It might have been that the protective compound never covered these points anyhow.
Now i got at small, sharp screwdriver, a pair of tweecers and a sharp blade and VERY CAREFULLY started to remove the compund at and around these sites. It is a fiddly work.
When the compund was gone i again inspected the sites with the magnifyingglass. The IC solding looked ok. But at the resistors the moist had corroded the soldering itself but also the actual coppercircut running in the board so that it no longer connected to the resistors.
I removed corrotion with the blade and then removed the protectiv lackur from the board, making it possible to solder a piece of wire from the circutboard to the resistors. Tested it and found that it was working OK!.
Now only remains to jerryrigg some sort of cover for the circutboard and apply some kind off new protective compound.
//Snowy