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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (Wiper System And Washer System) >> Diagnostic Information And Procedures >> Rear Wiper System Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

Windshield Wiper/Washer Switch

  1. Ignition OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
  2. Test for infinite resistance between the signal terminal 5 and the low reference terminal 1 with the rear window washer switch in the open position.
    • If less than infinite resistance 

      Replace the S82 Windshield Wiper/Washer Switch.

    • Go to next step: If infinite resistance 
  3. Verify the resistance reading is within the range specified below between the signal circuit terminal 5 and the low reference circuit terminal 1 by cycling the switch between Rear Wiper position and Rear Washers position.
    • Rear Wiper : 624-644 Ω
    • Rear Wiper Sweep : 1.99-2.01 kΩ
    • Rear Washer : 6.11-6.13 kΩ
    • If not within range specified 

      Replace the S82 Windshield Wiper/Washer Switch.

    • Go to next step: If within range specified 
  4. All OK
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