Rear wiper problem on a Citroen

when I unlock my C4 the rear wiper activates, this also happens when the boot or doors are opened it can also happen when I am driving. If the wiper stops half way up the rear window the wiper will not work on its own if I am driving, but if it settles in the rest position it will operate all by itself, can you help

Asked on 9 April 2012 by mick266

Answered by Honest John
Problem with the can bus wiring that uses the same power supply for various different components with what gets what apportioned electronically.
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