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.
Ignition Switch
- Ignition OFF, disconnect the harness connector at the ignition switch.
- Using the Resistance Test table below, check the resistance between the terminals of the ignition switch listed in each switch position.
Resistance Test
| Ignition Switch Position | Terminals 4 and 2 | Terminals 4 and 3 | Terminals 4 and 5 | Terminals 4 and 6 | Terminals 5 and 6 |
|---|---|---|---|---|---|
| Off Key Out | Infinite | Infinite | Infinite | Infinite | Infinite |
| Off Key IN | Infinite | Infinite | < 5.0 Ohms | Infinite | Infinite |
| Accessory | Infinite | < 5.0 Ohms | Infinite | Infinite | Infinite |
| Run | < 5.0 Ohms | < 5.0 Ohms | Infinite | Infinite | < 5.0 Ohms |
| Start | < 5.0 Ohms | Infinite | Infinite | Infinite | 1275-1325 Ohms |
- If any reading is not as specified, replace the ignition switch.