Component Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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.