87 740 sunroof does not pause between tilt and open..

Discussion in 'Volvo 740' started by rexdjohnston, Mar 31, 2007.

  1. rexdjohnston

    rexdjohnston Guest

    87 745, after some cleaning the sunroof opens closes and tilts up and
    down well enough, but it does not pause between, if that makes sense.

    I assume this is a fault in the motor assembly, a relay or switch or

    rexdjohnston, Mar 31, 2007
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  2. rexdjohnston

    James Sweet Guest

    There's some microswitches in the gearbox assembly, this will happen if
    one of those fails. Open it up and you'll see what I mean.
    James Sweet, Apr 1, 2007
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  3. rexdjohnston

    blurp Guest

    .... and don't be too hopeful of finding a replacement for the above
    mentioned microswitches. My 760 sunroof did the same and you just get
    good at eyeballing the middle position. Or you can buy the whole part
    from a yard.

    blurp, Apr 3, 2007
  4. rexdjohnston

    James Sweet Guest

    They look like pretty standard parts, I haven't had to replace them yet
    but Mouser, All Electronics, Newark, etc ought to have something suitable.
    James Sweet, Apr 3, 2007
  5. rexdjohnston

    Mike F Guest

    Generally what happens is the dash switch sticks, which keeps a solenoid
    in the motor assembly energized continuously. This solenoid is not
    designed to be activated for long periods, overheats and melts. You can
    remove this and rewind the solenoid if you're real handy with a
    soldering iron, and in general.

    Mike F.
    Thornhill (near Toronto), Ont.

    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
    Mike F, Apr 12, 2007
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