If Your Question Is That You Are Not Getting Much Water Onto The Windshield. Look For The Screen To Be Partially Stopped Up In The Washer Fluid Tank Or The Hose. Also You Could Have A Small Hole In The Line Not Allowing The Unit To Pull The Fluid To The Wipers.
They might be plugged with dirt, etc..
either the washer motor has burned out or there is dirt in the washer lines plugging up the washer nozzles.
Yes, but it will freeze and cause problems if you live in an area that freezes occasionally.
most likely the fuse is blown
If you were in a wreck you could have damaged your washer fluid reservoir or hoses leading to the spray nozzles. Slightly fill your reservoir with water and observe for leaks.
From the way that question sounds, there is nothing wrong. When you spray washer fluid on the windshield, the wipers are supposed to automatically come on for probably 3 or 4 swipes, then turn back off - it's a convienience thing when you need to clean your windshield. If your wipers are coming on automatically at random times, then you probably have a loose connection at the switch.
I don't know unless the pump is bad. I have a 98 XLT that the front washer doesn't work but the back one does. So it's not the pump since the same pump is used for the front and back. It may be the switch, GEM, or a relay... but I'm not smart enough to troubleshooting.
Fuse or windshield wiper motor.
Windshield wiper fluid
An old spark plug will cause too much power on VW Jetta GLS 1997 and make plug wire to arc out.
Are you sure it's oil? Most likely is engine coolant from the radiator. Next would be transmission fluid. Or it could be from the reservoir holding the windshield washer fluid. Oil from the front is unlikely.
A bad relay switch will cause the windshield wipers to not turn off. Replace the relay switch and the windshield wipers should turn off.