Diagnostic Aids
WARNING: This page is about a different car, the 1999 Pontiac Grand Am and 1999 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnose all other DRL DTCs before proceeding with DTC B2600.
- An open headlight bulb may set this DTC.
- If DTC is history, problem may be intermittent. Perform test procedure while wiggling wiring and connectors.