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 MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISWIPER AND WASHER SYSTEMSWINDSHIELD WASHER SWITCHTESTING AND INSPECTIONREAR
1990 Chevrolet Lumina APV V6-191 3.1L
Rear
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Rear
Rear Wiper-Washer Switch Check:
Before removing the wiper motor or washer pump from the vehicle, remove the wiring harness from the wiper motor and perform the wiper-washer switch checks.
The image should be used to check for proper switch operation after all wires are checked for continuity and fuses checked.
With the ignition switch on, probe connector to wiper-washer control switch. All voltage readings taken with respect to vehicle ground.
If the wiring and switch checks are OK, the problem is in the wiper motor or washer pump. Remove and replace the complete wiper motor or the washer pump.
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.