Wipers won't stop or run in intermittent mode when wet?!!!

Discussion in 'Chevy C/K Truck Forum' started by Philip Greer, Sep 6, 2011.

  1. Philip Greer

    Philip Greer New Member

    Weird issue here. I have a 1993 1500. When it is raining, I have an issue with my wipers where once I've turned them on, they will run at normal speed when the selector is on the intermittent mode, and even if I turn the selector to off to turn the wipers off, they'll still keep running for a while! I'm not certain that it isn't the switch mechanism on the turn signal wand, but the wipers do not behave this way when it is not raining. I can use the wipers to clean the windshield and run them on high, normal and intermittent mode and the control works as expected - and when I turn them off, they turn off. It seems to only occur when it is raining. So it seems that moisture is getting into some part of the electrical mechanism that controls the wiper functions from outside and/or in the engine compartment. I've not found any issue of moisture inside the cab at all.

    Any thoughts? I'd hate to replace the switch assembly on the turn signal wand (expensive) if that ends up not even being related to the issue....

    Thanks in advance!
  2. Revredneck

    Revredneck Rockstar 100 Posts

    The most common wiper problem on those trucks is cracked solder joints on the circuit board. Remove the cover from the wiper motor to reveal the board. You can pop the board out easily and take a good, hard look at the solder joints where the connector terminals are attached. You may need to use a magnifying glass to see it. Take a good soldering gun and re-melt the solder on those joints, you probably won't even need new solder. Reinstall the board and see if that hasn't fixed it. The whole process takes about 10 minutes, and it fixes 90 plus percent of wiper problems on those trucks.
    Good Luck and God Bless
  3. Philip Greer

    Philip Greer New Member

    Thanks a mil for the post! Will check that out here short - ly. Get it? *ahem*....

    ---------- Post added at 10:43 AM ---------- Previous post was at 10:02 AM ----------

    Definitely were cracks where the main connector is soldered to the board. Three out of the 5 had easily noticeable cracks in the solder completely encircling the connector post. I've re-soldered the 5 posts and am hoping this has resolved the issue! Thanks for the pointer - as well the cover doesn't seem to be very water tight, so I'm putting a little seal on it to see if that as well keeps humidity out of the box.

    Thanks again!

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