Confirm the complaint in the correct conditions
Separate a true DRL failure from normal headlamp/park-lamp behavior and from market-specific lighting differences.
LIGHTING · 2002
2002 Firebird Daytime Running Lamps Inoperative Diagnosis
DRL operation depends on system conditions and lighting control, so a daytime complaint is not automatically a bulb failure.
APPLICATION: 2002 Pontiac Firebird / Formula / Trans Am with the factory system described. Match options and installed hardware before applying a circuit path.
Run the lighting-system check
Factory lighting diagnosis starts with system checks and then routes to the DRL-specific symptom table. Check for related lighting faults rather than isolating the complaint too early.
Inspect shared lighting inputs and hardware
Verify the applicable lamps, connectors, control module/input path and visible wiring before replacing the DRL control hardware.
DO NOT BYPASS THE CONTROL LOGIC
Do not hard-wire lamps as a diagnostic shortcut. Preserve the factory lighting architecture while isolating the failed branch.
FPV RULE
OBSERVE → MEASURE → ISOLATE → PROVE → REPAIR → VERIFY. A symptom is a starting point, not a parts verdict.