Buick Regal 2018-2025 Service Manual / Accessories and Equipment / Lighting / Description and Operation
Buick Regal: Description and Operation
- Exterior Lighting Systems Description and Operation
- Interior Lighting Systems Description and Operation
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Exterior Lighting Systems Description and Operation
Exterior Lamps
The exterior lighting system consist of the following lamps:
Adaptive forward lighting
Automatic headlamp leveling
Automatic high beam assist
Backup lamps
Daytime running lamps
E
Interior Lighting Systems Description and Operation
Interior Lamps
The interior lighting system consist of two groups. This first group includes
lamps that may not be
dimmed.
Dome lamps
Instrument panel compartment lamp
Reading lamps
Rear compart
SEE MORE:
Radio Controls Malfunction (IOB)
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Refer to Diagnostic Procedure Instructions for an overview of each
diagnostic category.
Diagnostic Fa
Description and Operation
IMMOBILIZER DESCRIPTION AND OPERATION
Without BTM
The immobilizer system functions are provided by the Immobilizer Control
Module, the Body Control
Module (BCM) and the Engine Control Module (ECM), as well as any modules which
store and report
the environment identifier.
When an ignition key is
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