GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century (China) 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Brake Warning Indicator Inoperative

Brake Warning Indicator Inoperative Low Brake Fluid

Step

Action

Value(s)

Yes

No

1

Turn the ignition switch to RUN position.

Is the BRAKE warning indicator on?

--

Go to Step 2

Go to Brake Warning Indicator Inoperative

2
  1. Disconnect the brake fluid level indicator switch.
  2. Connect a 3A fused jumper between the brake fluid level indicator switch terminal B (circuit 209 (PPL)) and terminal A (circuit 1550 (BLK)).
  3. Turn the ignition switch to the RUN position.

Is the BRAKE warning indicator on?

--

Go to Step 3

Go to Step 4

3

Replace the brake fluid level indicator switch. Refer to Brake Fluid Level Indicator Switch Replacement .

Is the repair complete?

--

System OK

--

4

Test for a poor connection or an open between the brake fluid level indicator switch connector terminal A (circuit 1550) and ground.

Is there a poor connection or an open in circuit 1550?

--

Go to Step 5

Go to Step 6

5

Repair a poor connection or an open in circuit 1550.

Is the repair complete?

--

System OK

--

6

Repair a poor connection or an open in circuit 209.

Is the repair complete?

--

System OK

--

Brake Warning Indicator Inoperative During Bulb Test

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

2
  1. Connect the scan tool to the data link connector (DLC).
  2. Go to Special Functions.
  3. WOW the instrument cluster.

Is the BRAKE warning indicator light on?

--

System OK

Go to Step 4

4

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Step 5

--

5
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

--

Brake Warning Indicator Inoperative with Park Brake Applied

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

2

Turn the ignition switch to RUN position.

Did the BRAKE warning indicator on for 3 seconds during bulb test?

--

Go to Step 3

Go to Brake Warning Indicator Inoperative

3
  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the park brake indicator switch connector.
  3. Connect a 3A fused jumper between the park brake indicator switch harness connector terminal A (circuit  1830 (LT BLU)) and ground.
  4. Turn the ignition switch to the RUN position.

Is the BRAKE warning indicator on?

--

Go to Step 4

Go to Step 5

4

Replace the park brake indicator switch. Refer to Parking Brake Indicator Switch Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

--

5
  1. Turn the ignition switch to the LOCK position.
  2. Using a 3A fused jumper, backprobe from the automatic headlamp control module connector C2, terminal E (circuit  1830 (LT BLU)) to ground.
  3. Turn the ignition switch to the RUN position.

Is the BRAKE warning indicator on?

--

Go to Step 6

Go to Step 7

6

Repair a poor connection or an open in circuit 1830 (LT BLU) between the automatic headlamp control module connector C2 terminal E and the park brake indicator switch connector terminal A.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

--

7
  1. Turn the ignition switch to the LOCK position.
  2. Using a 3A fused jumper, backprobe between the automatic headlamp control module connector C2 terminal D and ground.
  3. Turn the ignition switch to the RUN position.

Is the BRAKE warning indicator on?

--

Go to Step 8

Go to Step 9

8

Replace the automatic headlamp control module. Refer to Headlamp Control Module Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

--

9
  1. Turn the ignition switch to the LOCK position.
  2. Using a fused jumper, backprobe between the body control module (BCM) connector C1 terminal D5 (circuit 233 (ORN/BLK)) and ground.
  3. Turn the ignition switch to the RUN position.

Is the BRAKE warning indicator on?

--

Go to Step 10

Go to Step 11

10

Repair the poor connection or open in circuit 233 (ORN/BLK) between automatic headlamp control module connector C2 terminal D and the BCM connector C1 terminal D5.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

--

11
  1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
  2. Perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

--

12
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

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