GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Intrigue 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Brake Warning Indicator Always On

Step

Action

Value(s)

Yes

No

1

Was the instrument Cluster Diagnostic System Check performed?

--

Go to Step 2

Refer to Diagnostic System Check - Instrument Cluster

2
  1. Disconnect the brake fluid level indicator switch.
  2. Turn the ignition switch to the RUN position.

Does the BRAKE warning indicator stay on?

--

Go to Step 3

Go to Step 4

3
  1. Turn the ignition switch to the LOCK position.
  2. Leave the brake fluid level indicator switch disconnected.
  3. Disconnect the electronic brake traction control module (EBTCM) connector C1.
  4. Turn the ignition switch to the RUN position.

Does the BRAKE warning indicator stay on?

--

Go to Step 5

Go to Step 6

4

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

Is the repair complete?

--

Go to Step 19

--

5
  1. Turn the ignition switch to the LOCK position.
  2. Leave the EBTCM connector C1 and the brake fluid level indicator switch disconnected.
  3. Disconnect the park brake indicator switch.
  4. Turn the ignition switch to the RUN position.

Does the BRAKE warning indicator stay on?

--

Go to Step 7

Go to Step 8

6

Refer to Diagnostic System Check - ABS (RPO L36) or Diagnostic System Check - ABS (RPO LX5).

Is the action complete?

--

Go to Step 19

--

7
  1. Turn the ignition switch to the LOCK position.
  2. Leave the park brake switch, EBTCM connector C1 and the brake fluid level indicator disconnected.
  3. Disconnect the daytime running lamps (DRL) control module.
  4. Turn the ignition switch to the RUN position.

Does the BRAKE warning indicator stay on?

--

Go to Step 9

Go to Step 10

8

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

Is the repair complete?

--

Go to Step 19

--

9
  1. Turn the ignition switch to the LOCK position.
  2. Leave the daytime running lamps (DRL) control module, park brake indicator switch, EBCM/EBTCM connector C1 and brake fluid level indicator switch disconnected.
  3. Disconnect the body control module (BCM) connector C1.
  4. Turn the ignition switch to the RUN position.

Does the BRAKE warning indicator stay on?

--

Go to Step 16

Go to Step 13

10

Test for a short to ground in circuit 1830.

Is there a short to ground in circuit 1830?

--

Go to Step 11

Go to Step 12

11

Repair short to ground in circuit 1830.

Is the repair complete?

--

Go to Step 19

--

12

Replace the DRL control module. Refer to Daytime Running Lights (DRL) Control Module Replacement .

Is the repair complete?

--

Go to Step 19

--

13

Test for a short to ground in circuit 233.

Is there a short to ground in circuit 233?

--

Go to Step 14

Go to Step 15

14

Repair short to ground in circuit 233.

Is the repair complete?

--

Go to Step 19

--

15

The BCM is causing the BRAKE warning lamp to stay on. Refer to Diagnostic System Check - Body Control System .

Is the action complete?

--

Go to Step 19

--

16
  1. Leave the instrument cluster connector, BCM, EBTCM connector C1 and brake fluid level indicator switch disconnected.
  2. Test for a short to ground in circuit 209.

Is there a short to ground in circuit 209?

--

Go to Step 17

Go to Step 18

17

Repair short to ground in circuit 209.

Is the repair complete?

--

Go to Step 19

--

18

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Step 19

--

19
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect connectors/components removed.

Is the action complete?

--

Refer to Diagnostic System Check - Instrument Cluster

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