Diagnostic Aids
WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
The following conditions may cause an intermittent:
- Intermittent short to ground or open in circuit No. 80 (Light Green wire).
- Intermittent open in circuit No. 1550 (Black wire).
- Poor connections at BCM or ignition key alarm switch.
- Internal short to voltage or open in BCM.
- Intermittent open in G203.