Question about 1990 GMC Sierra

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1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control

1990 GMC Sierra 1500 pickup. Windshield wipers will not turn off, windshield washer won't work, cruise control stopped working. Checked fuses, appear to be okay. Tried replacing switch, did not solve problem. Any ideas?

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  • Anonymous Mar 23, 2014

    My 1990 gmc sierra dash lights arent working i replaced fuses any ideas

  • Anonymous Mar 23, 2014

    Which fuse it that controls my radio inside light and cig lighter in my1992 gmc sierra 1500

  • Anonymous Mar 26, 2014

    cant find the fuse for the EFI system

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May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.

Posted on Feb 05, 2010

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  • steve_nd Nov 17, 2010

    I had the same problem. Not all 1990 had the circuit board as mentioned, mine had a mechanical switching system. You can get a new/rebuilt wiper motor with the circuit board that will replace the existing motor and solve your problems, did for me!

  • jay cseh
    jay cseh Jan 05, 2014

    mine is a 2002 GMC Savanna. i changed the motor and it worked for 3 days and then started blowing the fuse. now it just doesnt work

  • dogwood32 Jan 10, 2014

    Best guess would be to check for any pinched wires or any that have rubbed thru the insulation, If you find and Liquid electrical tape is the best fix for those hard to reach places.

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The fact of your cruise control 'wont work with the wipers' is a deliberate safety feature. Many vehicles (especially Japanese Hi End cars) wont allow a driver to use CC in the rain.

Posted on Aug 09, 2013

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1 Answer

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Windshield wipers have a mind of their own. Seems to be a short in the system, sometimes they work properly other times they won't but, I can hear the motor


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under the plastic cowl that the windshield wipers are on top of. removal of the wipers is nessecary. then removal of the cowl is next. and underneath all that should be the motor.

OR sometimes it is mounted on the firewall in the engine bay on either side usually can't miss it.

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