GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century (China) 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Personalization Mode Inoperative

Step

Action

Value(s)

Yes

No

Important: 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

Did you perform the Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

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

Are the courtesy lights OFF?

--

Go to Step 3

Go to Diagnostic System Check - Lighting Systems

3
  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 4

Go to Audible Warnings System Check

4
  1. Close all of 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 5

Go to Step 6

5

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 7

Go to Step 6

6
  1. Inspect the body control module (BCM) connectors for poor terminal contact. Repair as necessary.
  2. If the BCM connectors are OK, replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Is the repair complete?

--

Go to Step 8

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7
  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?

--

Go to Diagnostic System Check - Lighting Systems

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8
  1. Turn the ignition to LOCK.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

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