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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 518 (WIPER SYSTEM AND WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESREAR WIPER SYSTEM MALFUNCTIONCOMPONENT TESTING
2009 Chevrolet Tahoe Base, 4.8 C

Component Testing

2009 Chevrolet Tahoe Base, 4.8 CSECTION Component Testing
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.

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 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.
  4. With the rear wiper switch in the DELAY 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.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.