Diagnostic Fault Information
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. 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 |
|---|---|---|---|---|
| HDLP LO/HID Relay B+ | 1 | 1 | 1 | - |
| HI Beam Relay B+ | 1 | 1 | 1 | - |
| Flash to Pass Switch Signal | 1 | 1 | 1 | - |
| Headlamp Switch Headlamps ON Signal | B257A 00 | 1 | 1 | - |
| Headlamp Switch Headlamps OFF Signal | B257A 00 | 1 | 1 | - |
| Headlamp Switch High Beam Signal | 1 | 1 | 1 | - |
| Headlamp High Beam Relay Control | 1 | 1 | B2580 00 | - |
| Headlamp Low Beam Relay Control | 1 | 1 | B2575 00 | - |
| Headlamp and Panel Dimmer Switch Ground | - | 1 | - | - |
| LF Headlamp Ground | - | 1 | - | - |
| RF Headlamp Ground | - | 1 | - | - |
| Turn Signal/Multifunction Switch Ground | - | 1 | - | - |
| 1. Headlamps Malfunction | ||||