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 MANUALSCHEVROLET2009UPLANDER LT, 3.9 MREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTWIPER/WASHER SYSTEMSWIPERS AND WASHERSDIAGNOSTIC INFORMATION AND PROCEDURESDTC B3922COMPONENT TESTING
2009 Chevrolet Uplander LT, 3.9 M
Component Testing
2009 Chevrolet Uplander LT, 3.9 MSECTION Component Testing
Multifunction Switch
- With the ignition OFF, disconnect the X3 harness connector at the turn signal/multifunction switch.
- Test the resistance between terminals M and N. Rotate the wiper switch and compare the resistance readings to the values in the Windshield Wiper Switch Values table below for MIST, each DELAY and LOW speed.
- If the resistance is not within the specified range, replace the turn signal/multifunction switch.
- Test for infinite resistance between terminals M and K while rotating the wiper switch to MIST, each DELAY and LOW speed positions.
- If the less than infinite, replace the turn signal/multifunction switch.
- Test for less than 5 ohms of resistance with the wiper switch in the High speed position.
- If greater than 5 ohm, replace the turn signal/multifunction switch.
- Test for infinite resistance between terminals H and L while rotating the wiper switch to MIST, each DELAY and LOW speed positions.
- If less than infinite, replace the turn signal/multifunction switch.
- Test for less than 5 ohm of resistance while pressing the WASHER switch.
- If greater than 5 ohm, replace the turn signal/multifunction switch.
IMPORTANT:
If the switch tests open in any switch position other than Off, test the wiper/washer switch signal circuits for a short to voltage before replacing the switch.
Wiper Switch Values
| Switch Position | Resistance |
|---|---|
| Off | Infinite |
| Mist | 300-364 Ξ© |
| Delay 1 | 3.48K-4.25K Ξ© |
| Delay 2 | 2.52K-3.08K Ξ© |
| Delay 3 | 1.78K-2.18K Ξ© |
| Delay 4 | 1.17K-1.44K Ξ© |
| Delay 5 | 697-851 Ξ© |
| Low | 300-364 Ξ© |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.