LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1950 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    Refer to Electrical Center Identification Views for the test points (TP).

  1. Observe the scan tool Windshield Wiper Switch parameter while rotating the wiper switch. The reading should change between Off, Intermittent and Low.
    • If the Windshield Wiper Switch parameter is incorrect in the Low or High switch positions, refer to the Multifunction Switch Circuit Test and/or the Turn Signal Multifunction Switch Component Test.
  2. Observe the scan tool BCM Wiper Park Switch parameter. The reading should display Active when the wipers are parked and Inactive with the wipers ON or out of the park position.
    • If the Wiper Park Switch parameter is always Active or Inactive, refer to Wipers do not Park Circuit Test.
  3. Connect a test lamp between the test point TP95 terminal in the underhood fuse block and ground.
  4. Verify the test lamp turns on and off while turning the windshield wiper switch between LOW and OFF.
    • If the test lamp does not turn on and off while changing between the commanded states, refer to WIPER 1 Relay Control Circuit Test.
    5. NOTE:

    If equipped with CE1 (rain sense), wipers will swipe once when windshield wiper switch is in Delay position. Spray outside of windshield with water bottle where inside rear view is attached to reactivate wipers.

  5. Ignition ON, operate the windshield wiper switch through the Delay, Low, and High positions.
    • If the windshield wipers are inoperative in 1 or more of the delay settings only, test or replace the turn signal multifunction switch.
    • If the windshield wipers operate at high speed while the switch is in the Low position, refer to WIPER 2 Relay Control Circuit Test.
    • If the windshield wipers operate at low speed while the switch is in the High position, refer to WIPER 2 Relay Control Circuit Test.
    • If the windshield wipers are inoperative in the Low or High switch positions, refer to Wiper Motor Circuit Test and/or the Wiper Motor Component Test.
scientia non olet · About LEMON Manuals