Front wiper problem turns out to be rear wiper connection corrosion, so check yours

this applies to the Mk4 Golf at least..
I had a front wiper coming on without being selected, and the problem apparently was the connection to the rear wiper motor, so I pulled the cover and had a look, and it does corrode, as well, the rubber grommet under the arm, lets water in. so silicone the grommet in, and check the connection and if corroded, there is a plastic cover that comes off the motor, and it will be corroded also.

Pics would be GREAT!

Do you have pictures. This happened to me two years ago, dealer replaced corroded ground wire #12, but now it's happening again and I need to fix it. Rear wiper only goes on when I first start the car and stops wherever it wants to after about 30 seconds. Thanks, Laney