You got two choices... either the switch is broken, or the module that
does the intermittent wiping is broken. There's no computer control or
anything here, it's just a switch in series with the motor pretty much.
"C'est un Nagra. C'est suisse, et tres, tres precis."
IF the wiper motor is anything like the sunroof motor, there will be a home
position switch that tells the motor to stop in a certain place. This switch
can be broken/dirty, and this can cause the motor to run on after the
selector has been set to off.
Technically, the home switch will be in the gearbox that connects the motor
to the wiper arms, if there is one ...
My money is on the wiper control switch -- the one the driver uses to start
and stop the wipers.
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