SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 49 (WIPER SYSTEM AND WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESWINDSHIELD WIPER SYSTEM MALFUNCTIONCOMPONENT TESTING
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol

Component Testing

2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Component Testing
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. 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 1 and the low reference terminal 2 with the high speed 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. Test for less than 2 Ω between the signal circuit terminal 1 and the low reference circuit terminal 2 with the high speed switch in the closed position.
    • If 2 Ω or greater 

      Replace the S82 Windshield Wiper/Washer Switch.

    • Go to next step: If less than 2 Ω 
  4. Test for infinite resistance between the signal terminal 3 and the low reference terminal 2 with the low speed switch in the open position.
    • If less than infinite resistance 

      Replace the S82 Windshield Wiper/Washer Switch.

    • Go to next step: If infinite resistance 
  5. Verify the resistance readings are within the specified range listed below between the signal circuit terminal 3 and the low reference circuit terminal 1 by pushing the switch in the listed positions below:
    • Delay 1 : 3.75-3.85kΩ
    • Delay 2 : 2.75-2.85kΩ
    • Delay 3 : 1.95-2.05kΩ
    • Delay 4 : 1.25-1.35kΩ
    • Delay 5 : 765-775Ω
    • If not within the specified range 

      Replace the S82 Windshield Wiper/Washer Switch.

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

Relay Test

  1. Ignition OFF, disconnect the appropriate relay.
  2. Test for 60 - 200 Ω between terminals 85 and 86.
    • If less than 60 or greater than 200 

      Replace the relay.

    • Go to next step: If between 60 - 200 Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If less than infinite resistance 

      Replace the relay.

    • Go to next step: If infinite resistance 
  4. Test for less than 5 Ω between terminals 30 and 87A.
    • If 5 Ω or greater 

      Replace the relay.

    • Go to next step: If less than 5 Ω 
  5. Install a 10 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground.
  6. Test for less than 5 Ω between terminals 30 and 87.
    • If 5 Ω or greater 

      Replace the relay.

    • Go to next step: If less than 5 Ω 
  7. All OK
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.