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HOMESERVICE MANUALSGMC2011SAVANA SPECIAL 4.8 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 170 (WIPER SYSTEM AND WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESWINDSHIELD WIPER WASHER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2011 GMC Savana Special 4.8 A

Circuit/System Verification

2011 GMC Savana Special 4.8 ASECTION Circuit/System Verification
WARNING: This page is about a different car, the 2011 GMC Savana and 2011 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool Windshield Washer Switch parameter while pressing and releasing the washer switch. The reading should change between Active and Inactive.
    • If the reading does not change between the specified values, refer to the Windshield Washer Switch Circuit Test in Circuit/System Testing .
  2. Connect a test lamp between the relay side of the FRT WASH fuse and ground.
  3. Ignition ON, verify that the test lamp turns ON and OFF while pressing and releasing the windshield washer switch Circuit/System Testing .
    • If the test lamp does not turn ON and OFF while changing between the commanded states, refer to the Windshield Washer Pump Relay Control Circuit Test in Circuit/System Testing .
  4. If the washer pump does not operate, refer to the Windshield Washer Pump Circuit Test in Circuit/System Testing .
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