Took myu 300M in for 30K sergfvcie and now the wiper shield wiper fluid doesn't pump!

Discussion in 'Chrysler 300' started by Marc, Oct 19, 2003.

  1. Marc

    Marc Guest

    I made sure that it's full but it doesn't work where do I start trouble
    shooting this beast?

    Marc
     
    Marc, Oct 19, 2003
    #1
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  2. Marc

    StevJensen Guest

    "Marc"
    Bring it back and tell them they broke it.
     
    StevJensen, Oct 19, 2003
    #2
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  3. Marc

    Bill Putney Guest

    Marc,
    According to my '99 FSM schematics, the same fuse runs the wiper motor
    that runs the pump motor, so, assuming your wipers are working OK, that
    fuse is good.

    The +12V source to run that motor is connected to both a contact on the
    multi-functuin switch (manual operation), and to a driver output of the
    BCM (for automatically timed operation). So, if the pump doesn't pump
    under any circumstances, the wires feeding power or ground to the motor
    are bad, the pump itself is bad or there's a plumbing problem. Can you
    hear the motor running at any time?

    Disconnect the two-wire connector to the pump motor and jumper +12V
    (brown wire) and ground (black wire) to the motor and see if she pumps
    then. I believe the motor/pump is built into the washer bottle.

    Bill Putney
    (to reply by e-mail, replace the last letter of the alphabet in my
    address with "x")
     
    Bill Putney, Oct 19, 2003
    #3
  4. Marc

    Greg Johnson Guest

    Interesting, maybe that helps explain why my wipers often wouldn't wipe when
    the temperature was cold and the switch was on DELAY mode. BCM couldn't or
    wouldn't send signal (wiper park switch?) but the ON position sends juice
    directly to the motor. I'm surprised that any switches send juice directly
    to anything without using the computer actually.

    Dealer said they couldn't fix or find a problem when the car was under
    36mo/36mi warranty. They did recently fix it under my service contract for a
    $50 deduct (and some other work too) by replacing the entire wiper motor
    assembly. I'm starting to really believe that paying $750 for 7 years
    wasn't a horrible idea, especially if the windows start acting up. Prices
    today for similar coverage are much higher though.
     
    Greg Johnson, Oct 19, 2003
    #4
  5. Marc

    Bill Putney Guest

    Actually that sentence of mine was referring to the washer motor - not
    the wiper motor (upon re-reading, I see that I could have made that more
    clear - but the context from the OP's post was the washer motor). But
    keep reading...
    The wiper motor is driven thru two relays (fast and slow). The relay
    control signals come from the BCM. All wiper motor commands (on slow,
    on fast, intermittent) go to the BCM from the multi-function switch MUX.

    It is a very common problem (possibly 100% across the board?) with the
    2nd gen LH vehicles that the wipers go haywire in cold weather (I'm
    thinking 25°F and below). It is an obvious design flaw, and why they
    haven't been recalled because of it I'll never understand since the
    wipers are given the same priority as brakes as far as failure of a
    safety system in the automotive design FMEAS (Failure Modes and Effects
    Analyses) that I participated in.

    I'll wager as winter arrives and temperatures drop, you'll start seeing
    posts on this ng about wipers not working correctly in cold weather.
    My guess, from the way my Concorde's wipers behave in cold weather, is
    that the wiper park sense switch (probably a hall effect) output is
    temperature dependent, and at some temperature, either it shifts enough,
    or the BCM sense threshold shifts enough, or both, that the park sensing
    is gets messed up. By them replacing your wiper motor assembly, the
    park sense switch got replaced by one with a design (or calibration)
    tweak.

    Bill Putney
    (to reply by e-mail, replace the last letter of the alphabet in my
    address with "x")
     
    Bill Putney, Oct 19, 2003
    #5
  6. Marc

    Pete Geurds Guest

    We have a 97 Intrepid that has this problem off and on.
    Some days the wipers work correctly on all settings.
    Other days nothing happens until the switch is set to high speed.
    While malfunctioning the wipers may stop mid stroke when switch is turned to
    off,
    also they may run continuously on intermittent.
    Then suddenly it's all back to normal.
    What to check?

    Pete Geurds
    Douglassville, PA
     
    Pete Geurds, Oct 27, 2003
    #6
  7. Marc

    StevJensen Guest

    (Pete Geurds) wrote

    There is a ground strap on one of the bolts of the motor.
    Remove bolt and polish all the corrosion off strap and contact points.
     
    StevJensen, Oct 28, 2003
    #7
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