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 Switch Park Lamps ON Signal | 2 | B257A 00 | 2 | - |
| Headlamp Switch Headlamps OFF Signal | B257A 00 | 1 | 1 | - |
| Headlamp Switch Headlamps ON Signal | B257A 00 | 1 | 1 | - |
| Headlamp Switch Ground | - | 1 | - | - |
| 1. Headlamps Malfunction 2. Park, License, and/or Tail Lamps Malfunction |
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