Component Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Turn Signal Multifunction Switch
- Ignition OFF, disconnect the X1 harness connector at the turn signal multifunction switch.
- With the wiper switch in the HIGH position, test for less than 2 ohms between the low reference terminal M and the signal terminal K.
- If greater than the specified range, replace the windshield wiper washer switch.
- While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal M and the signal terminal N.
IMPORTANT:
If the switch tests open in any switch position other than Off, test the signal circuits for a short to voltage before replacing the switch.
Wiper Switch Values
| Switch Position | Resistance |
|---|---|
| Off | Infinite |
| Mist | 300-364 Ω |
| Delay 1 | 3.48k-4.25k Ω |
| Delay 2 | 2.52k-3.08k Ω |
| Delay 3 | 1.78k-2.18k Ω |
| Delay 4 | 1.17k-1.44k Ω |
| Delay 5 | 697-851 Ω |
| Low | 300-364 Ω |
| High | 300-364 Ω |
- If any switch position is not within the specified range, replace the turn signal multifunction switch.