Intermittent rear wiper problem 08 Yukon

Discussion in 'Audio & Electronics' started by alstonsailor, Aug 6, 2019.

  1. alstonsailor

    alstonsailor TYF Newbie

    Posts:
    9
    Likes Received:
    0
    Joined:
    Aug 6, 2019
    Name:
    Jared
    Thank you.
     
  2. Doubeleive

    Doubeleive Supporting Member

    Posts:
    7,383
    Likes Received:
    5,938
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    it's not just a motor it also has a control module
     
  3. alstonsailor

    alstonsailor TYF Newbie

    Posts:
    9
    Likes Received:
    0
    Joined:
    Aug 6, 2019
    Name:
    Jared
    Where is the module? Is it a relay?
     
  4. Doubeleive

    Doubeleive Supporting Member

    Posts:
    7,383
    Likes Received:
    5,938
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    this is why I said it would be easier to test the motor first just to rule it out, lol

    Rear Wiper Motor Circuit Test
    1. Ignition OFF, disconnect the harness connector at the rear window wiper motor.
    2. Test for less than 1.0 ohm between the ground circuit terminal D and ground.
     If greater than the specified range, test the ground circuit for an open/high resistance.
    3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
     If the test lamp does not illuminate, test the B+ circuit for an open/high resistance or short to
    ground.
    4. Ignition ON, test for B+ at the signal circuit terminal A while the rear window wiper switch is in the
    delay and on switch positions.
     If B+ is not present, test the signal circuit for an open/high resistance or short to ground. If the
    circuit tests normal replace the turn signal multifunction switch.
    5. If all circuits test normal replace the rear window wiper motor.
    Component Testing
    Rear Window Wiper Switch
    1. Ignition OFF, disconnect the X4 harness connector at the turn signal multifunction switch.
    2. Rear wiper switch OFF, test for infinite resistance between the ignition terminal 1 and the signal terminal
    2.
     If not the specified value, replace the turn signal multifunction switch.
    3. Rear wiper switch in the ON position, test for 900-1.5K ohms between the ignition terminal 1 and the
    signal terminal 2.
    If not within the specified range, replace the turn signal multifunction switch.
    4. With the rear wiper switch in the DELAY position, test for 2000-2400 ohms between the ignition
    terminal 1 and the signal terminal 2.
     If not within the specified range, replace the turn signal multifunction switch.
     
  5. Doubeleive

    Doubeleive Supporting Member

    Posts:
    7,383
    Likes Received:
    5,938
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    I believe the module is part of the rear motor assembly

    also just a side note, if your vehicle is "rain sense" equipped the issue you are having could be related because the wiper will only wipe once unless rain is detected, so to test that if you have rain sense pour water over the front window view rear mirror area which is where the rain sense sensor is located and see if the wiper activates like it should.
     
  6. wjburken

    wjburken Full Access Member

    Posts:
    876
    Likes Received:
    1,121
    Joined:
    Dec 26, 2017
    Location:
    Eastern Iowa
    Name:
    Wade
    I was not aware that the rain sensing function had any impact on the rear wiper. Thought it only controlled the windshield.
     
  7. alstonsailor

    alstonsailor TYF Newbie

    Posts:
    9
    Likes Received:
    0
    Joined:
    Aug 6, 2019
    Name:
    Jared
    I just have to figure out which part is telling it to not keep going.
     
  8. Doubeleive

    Doubeleive Supporting Member

    Posts:
    7,383
    Likes Received:
    5,938
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    it might not control the rear wiper but it would be easy to find out by just running a water hose over the front window, and that may only apply if the wipers were in delay mode
     
    Last edited: Aug 6, 2019
  9. wjburken

    wjburken Full Access Member

    Posts:
    876
    Likes Received:
    1,121
    Joined:
    Dec 26, 2017
    Location:
    Eastern Iowa
    Name:
    Wade
    Very true. Wasn’t discounting your troubleshooting methods. Thought I learned something about my last vehicles that I didn’t know about.

    Continue with your course on troubleshooting.
     
  10. Doubeleive

    Doubeleive Supporting Member

    Posts:
    7,383
    Likes Received:
    5,938
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    it was just a Note in the service manual, but looks like it would only apply if the wipers were in delay mode
     

Share This Page