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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1963 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESREAR WIPER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the multifunction switch.
- Ignition ON, test for ignition voltage between the ignition voltage circuit terminal 11 and ground
- If not the specified value, test the ignition circuit for a short to ground or an open/ high resistance. If the circuit tests normal, replace the BCM.
- Ignition OFF, connect the harness connector at the multifunction switch. Disconnect the harness connector at the rear window wiper/washer module.
- Test for less than 10 ohms between the ground circuit terminal 4 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 5 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition ON, rear wiper/washer switch in the WIPER position, test for ignition voltagebetween the signal circuit terminal 1 and ground.
- If not the specified value, test the signal circuit for a short to ground or an open/high resistance, If the circuit tests normal, replace the multifunction switch.
- Liftgate closed, test for infinite resistance betweenthe signal circuit terminal 3 and ground.
- If not the specified value, test the signal circuit for a short to ground.
- If all circuits test normal, test or replace the rear window wiper/washer module.
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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.