Test Description
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The number(s) below refer to the step number(s) on the diagnostic table.
- 2. Listen for an audible click when the ground illumination relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
- 3. Tests for voltage at the coil side of the ground illumination relay. The SEO1 fuse supplies power to the coil side of the ground illumination relay.
- 4. Verifies that the body control module is providing ground to the ground illumination relay.
- 5. Tests if ground is constantly being applied to the ground illumination relay.
- 12. After replacement of the BCM you must calibrate the new module for proper operation.