Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Daytime Running Lamp Relay B+ | 1 | 1 | - | - |
| Headlamp LO/HID Relay B+ | 1 | 1 | - | - |
| High Beam Relay B+ | 1 | 1 | - | - |
| Ambient Light Sensor Signal Circuit | B2645 03 | B2645 07 | B2645 07 | - |
| Headlamp Flash to Pass Signal | 4 | 4 | 4 | - |
| Headlamp Dimmer Switch Signal | 4 | 4 | 4 | - |
| Daytime Running Lamp Relay Control | 3 | 3 | B2600 00 | - |
| Headlamp Low Beam Control | 1 | 1 | 1 | - |
| Headlamp Low Beam Relay Control | 1 | 1 | B2575 00 | - |
| Headlamp Switch Off Control | B257A 00 | 2 | 2 | - |
| Headlamp Switch On Control | B257A 00 | 1 | 1 | - |
| Headlamp High Beam Control | 1 | 1 | 1 | - |
| Headlamp High Beam Relay Control | 1 | 1 | B2580 00 | - |
| Park Lamp Switch On Control | B257A 00 | B257A 00 | 2 | - |
| Ambient Light Sensor Ground Circuit | - | B2645 07 | - | - |
| Headlamp Switch Ground | - | 2 | - | - |
| Turn Signal/Multifunction Switch Malfunction | - | 4 | - | - |
| 1. Headlamp Malfunction 2. Headlamp Switch Malfunction 3. Daytime Running Lamps Malfunction 4. Turn Signal/Multifunction Switch Malfunction |
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