Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 49 (WIPER SYSTEM AND WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESWINDSHIELD WIPER SYSTEM MALFUNCTIONDIAGNOSTIC FAULT INFORMATION
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
Diagnostic Fault Information
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Diagnostic Fault Information
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.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Windshield Wiper Switch Low Signal terminal 3 | 1 | 1 | 1 | - |
| Windshield Wiper Switch High Signal terminal 1 | 4 | 2 | 2 | - |
| Windshield Wiper Motor Park Switch Signal terminal 2 | 3 | 3 | - | - |
| Front Wiper Relay Control terminal 85 | B3715 02 | B3715 04 | B3715 01 | - |
| Windshield Wiper High Speed Relay Control terminal 86 | B3875 02 | B3875 04 | B3875 01 | - |
| Front Wiper Motor Control terminal 4 | 1 | 1 | 4 | - |
| Front Wiper Motor Speed Control terminal 5 | 1 | 1 | 4 | - |
| Windshield Wiper Switch Low Reference terminal 2 | - | 1, 2 | 1, 2 | - |
| Windshield Wiper Motor Ground terminal 1 | - | 1, 2, 3 | - | - |
| Windshield Wiper Relay Ground terminal 86 | - | 1 | - | - |
| 1. Delay or Low Speed Wipers Inoperative 2. High Speed Wipers Inoperative 3. Wipers Do Not Park 4. Wipers Always ON |
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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.