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Thread: Wierd wiper fault

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    Default Wierd wiper fault

    My front wipers were working normally till I started up 2 days ago. Now the flick wipe (1 downward press) works but the blades stop when I let go of the switch (no matter where they are). The intermittent setting which should be controlled by the rain detector (first upward movement) gives standard speed constant wipe, as does the next upward movement (which is correct) The last upward movement gives the correct high speed wipe. There is no hesitation or jerky movement, just the settings seem wrong. The front wash/wipe isn't working (no sound so the motor isn't trying and the wipers don't move). Rear wash/wipe is working normally. This has happened exactly the same twice before in very cold conditions but cleared itself as soon as things thawed, today the temperature has been 14c and since the fault has been there for 3 warm days now it looks like its here to stay. I've spent hours reading on the web but the only references to this same fault are put down to very cold weather and they say it clears when it warms up. Any thoughts - thanks in advance. Bob

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    Regular Member Robsey's Avatar
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    Sounds like the wiper relay to me.

    There were faults like this all over the Christmas period when temperatures plunged below minus 7 degrees.

    The repair was indeed found to be the replacement of a cream-crackered relay.
    Hope that helps.

    Beyond this, you could consider the switch itself, dirty faulty contacts.

    Absolutely lastly, get the CIM module checked out...I say lastly as this is a lot less likely than the relay and switch, but it is by far the most expensive item to replace.

    If the wipe is full speed at all times when switched on, then this will either be the relay, or possibly the supply fuse for the wiper circuit. Part of the cars failure mode back-up system...it bypasses the relay when it is faulty, or not energising (hence mention of the fuse).

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    Default wiper fault

    In case it helps anyone - the weird fault on my front wipers was cured by a new wiper motor at hideous expense - the mechanic at the local garage had exactly the same fault on his Vectra - I don't expect he charged himself £50 an hour to mend it though

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