Wiper arm won't return....sometimes

[scotta@mailhost.amcc.com (Scott Applebaum)]

Hi all,

I have a '88 80 Quattro. The wiper won't go back down if it is in the
intermitten mode. If you push it once to do a single wipe it also doesn't
return.It works fine in normal full running mode at all speeds.

My qestion is:

Is there a problem with the motor or the wiper relay.

Thanks