92 240 GL Wipers not parking, intermittent not working

Discussion in 'Volvo 240' started by James Sassman, Apr 2, 2008.

  1. This started a couple years back when the wipers were frozen down and I hit
    the switch not realizing that.
    Now, no intermittent and they do not park.

    Is this built into the motor--as a forum member on the internet someplace
    said--or is this built into the motor?

    Thanks!
     
    James Sassman, Apr 2, 2008
    #1
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  2. James  Sassman

    James Sweet Guest

    Park is built into the motor, the contacts are under the cover on the
    gearbox. The intermittant is handled by an electronic relay tucked under the
    dash somewhere.
     
    James Sweet, Apr 2, 2008
    #2
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  3. James  Sassman

    Ken Phillips Guest

    What do you have instead of intermittent wiper, nothing? or little blips
    of wiper motion every few seconds?
    The relay referred to by James above, does intermittent by giving the
    wiper motor a little 'kick', after which the park switch in the motor
    takes over, feeding a positive supply to the motor until it parks after
    it's swept the windscreen once, ready for the next little kick.
    I don't have my 240 car, or manual any more, so I can't help much with
    which fuses and wires carry the necessary ign +ve's to the intermittent
    relay and the wiper motor park switch.
    You said that intermittent ceased to work after you stalled the wiper
    motor in cold weather, how possible is it that a fuse has failed due to
    the high current it would have drawn? This would necessarily affect the
    normal wiper function.
    I know that the headlamp wiper motors, the door lock motors and window
    winder motors, all had positive temperature coefficient disks to protect
    them and the cabling from high stall currents, I don't think the
    windscreen wiper motor did have a PTC though, meaning that if stalled it
    will draw a large constant current.
    BTW ISTR that the park switch works really strangely, when parked the
    motor is effectively shorted (via a diode?), which means that it stops
    dead, just when it should, instead of coasting round a bit more due to
    inertia, as it would do if the +ve supply was merely disconnected.

    Ken Phillips
     
    Ken Phillips, Apr 3, 2008
    #3
  4. James  Sassman

    Ken Phillips Guest

    Oops sorry, I meant to write 'This wouldn't necessarily affect the
    normal wiper function.' here.
     
    Ken Phillips, Apr 3, 2008
    #4
  5. I know this is silly but the arm isnt loose on the shaft from the strain is
    it? My sons came loose and all I did was tighten the nut a little when it
    was in its proper place.
     
    John Robertson, Apr 3, 2008
    #5
  6. This did happen once a while back and I did the same thing: tightened the
    nut after moving the arm to the proper position.

    Thanks for your suggestion and help!

    Jim
     
    James Sassman, Apr 3, 2008
    #6
  7. There's no fuse failure as I've recently checked all of them.
    The actual behavior of the intermittent is as follows: when moving the wiper
    lever to the intermittent position, the wipers raise to about 2/3's or 3/4's
    of the normal arc and stop. Moving the wiper lever to the low speed wiping
    position initiates a continuted sweeping action to the top and back
    downward--but never to the parking positon.

    Since, from other replys to the group and your information, it seems the
    intermittent actions are shared by the relay and the motor. I plan to
    replace both since Ebay has a number of them available. I'm just debating
    new or used but will probably go with new.

    Thanks for your help!
     
    James Sassman, Apr 3, 2008
    #7
  8. James  Sassman

    James Sweet Guest

    Sounds like the motor is at fault, look at that first, don't bother
    replacing the relay unless it's still malfunctioning.
     
    James Sweet, Apr 3, 2008
    #8
  9. Ordered a new, after-market wiper motor on Ebay today: $44.90 including
    shipping and looks, according to the picture, exactly like one on Ebay that
    was $69.90. Am hoping this works to correct the annoying problem!

    Thanks, everyone!

    --Jim
     
    James Sassman, Apr 4, 2008
    #9
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