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 OFF, disconnect the harness connector at the stop lamp switch.
- With the brake pedal released, test for infinite resistance between terminal A and terminal B at the stop lamp switch.
- If not the specified value, replace the stop lamp switch.
- With the brake pedal released, test for less than 1.0 ohm between terminal C and terminal D at the stop lamp switch.
- If not the specified value, replace the stop lamp switch.
- With the brake pedal applied, test for less than 1.0 ohm between terminal A and terminal B at the stop lamp switch.
- If not the specified value, replace the stop lamp switch.
- With the brake pedal applied, test for infinite resistance between terminal C and terminal D at the stop lamp switch.
- If not the specified value, replace the stop lamp switch.