Diagnostic Fault Information
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. 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 |
|---|---|---|---|---|
| Headlamp Low Beam Relay Control (with T4F) | B258A 02, B258A 04 | B258A 02, B258A 04 | B258A 01 | - |
| Low Beam Headlamp Control - Left (with T4F) | 1 | 1 | 1 | - |
| Low Beam Headlamp Control - Right (with T4F) | 1 | 1 | 1 | - |
| Headlamp Ground - Left | - | 1 | - | - |
| Headlamp Ground - Right | - | 1 | - | - |
| 1. Headlamps Malfunction | ||||