ghost wipe, or pre-rain detection technology
are caused by the circuit board on the motor having a short in it. Mine starts doing it when I've been driving for an hour and it starts getting warmer (or when its just about to rain) also the delay switch in the motor itself can have problems but I haven't worked on those. As far as I know, these problems are not related to the cc arm.
Trev
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"You obviously have a great economy with words, I look forward to your next syllable with great eagerness"