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 MANUALSCHEVROLET2003TRAILBLAZER 4WD L6-4.2L VIN SREPAIR AND DIAGNOSISWIPER AND WASHER SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESWIPER INOPERATIVE - REAR
2003 Chevrolet TrailBlazer 4WD L6-4.2L VIN S
Wiper Inoperative - Rear
2003 Chevrolet TrailBlazer 4WD L6-4.2L VIN SSECTION Wiper Inoperative - Rear
WIPER INOPERATIVE - REAR
TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
3. If any of the liftgate or liftglass switch fails ajar the rear wiper will not operate.
4. This step determines if the liftgate control module is receiving the correct switch position message from the body control module.
5. This step determines if the liftgate control module is attempting to operate rear wiper motor in the requested operating mode.
6. This step tests the resistance through the rear wiper switch. The measured resistance will be highest in the OFF position and reduce as the switch is turned from positions 1 through 3.
TEST DESCRIPTION
Steps 1-3:
Steps 4-6:
Steps 7-11:
Steps 12-18:
Steps 19-20:
The numbers below refer to the step numbers on the diagnostic table.
3. If any of the liftgate or liftglass switch fails ajar the rear wiper will not operate.
4. This step determines if the liftgate control module is receiving the correct switch position message from the body control module.
5. This step determines if the liftgate control module is attempting to operate rear wiper motor in the requested operating mode.
6. This step tests the resistance through the rear wiper switch. The measured resistance will be highest in the OFF position and reduce as the switch is turned from positions 1 through 3.
RENDER: 1.0x
NO RELATED
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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.