GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Regal 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Personalization Mode Inoperative

Step

Action

Value(s)

Yes

No

The Body Control Module (BCM) has the following interior lighting modes:

    • Delayed illumination turns on the courtesy light for 25 seconds after the last door is closed with the ignition switch off.
    • Exit lighting turns on the courtesy lights for 25 seconds upon removing the key from the ignition switch.

This table diagnoses a problem when these interior lighting modes do not operate as specified.

1

Was the Interior Lights System Check performed?

--

Go to Step 2

Refer to Interior Lamps System Check

2

Did you perform the BCM Diagnostic System Check?

--

Go to Step 3

Refer to Diagnostic System Check - Body Control System

3
  1. Turn the ignition switch to the RUN position.
  2. Lower the driver's window in order to prevent lockout.
  3. Close all the vehicle doors.
  4. Turn off the IP dimmer switch.

Are the courtesy lights off?

--

Go to Step 4

Go to Courtesy Lamps Always On

4
  1. Turn the ignition switch to the LOCK position.
  2. Leave the key in the ignition switch.
  3. Open any vehicle door.

Does the key in the ignition chime?

--

Go to Step 5

Refer to Audible Warnings System Check

5
  1. Close all the vehicle doors.
  2. Turn off the IP dimmer switch.
  3. Turn the ignition switch from LOCK to RUN, then back to LOCK.
  4. Observe the courtesy lights and remove the key from the ignition switch.

Do the courtesy lights turn on for 25 seconds upon removing the key from the ignition switch?

--

Go to Step 6

Go to Step 7

6

Observe the courtesy lights and open any vehicle door.

Do the courtesy lights turn on for 25 seconds upon closing the last door?

--

Go to Step 8

Go to Step 7

7
  1. Inspect the Body Control Module (BCM) connectors for poor terminal contact. Make repairs as necessary.
  2. If the BCM connectors are OK, then replace the BCM. Refer to Body Control Module Replacement in Body Control System.
  3. After BCM replacement, perform the Setup New BCM Procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Has the repair been made?

--

Go to Step 9

--

8
  1. Turn the ignition switch from LOCK to RUN, then back to LOCK.
  2. Open, then close any vehicle door.
  3. Observe the courtesy lights and turn the ignition switch to the RUN position.

Do the courtesy lights turn off upon turning the key to the RUN position?

--

System OK

--

9
  1. Turn the ignition to LOCK.
  2. Reconnect all connectors.

Have all the repairs been made?

--

Refer to Interior Lamps System Check

--