GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Brake Warning System Check performed?

--

Go to step 2

Go to Brake Warning System Check

2

Does the BRAKE indicator illuminate with the park brake applied?

--

Go to step 3

Go to step 8

3

  1. Disconnect the brake fluid level switch.
  2. Connect a test lamp between connector harness terminals A and B.
  3. Turn the ignition switch to RUN.

Does the test lamp light?

--

Go to step 4

Go to step 5

4

Check the IPC brake indicator.

Does the brake indicator light?

--

Go to step 11

Go to step 13

5

Connect a test lamp between connector harness terminals A and ground.

Does the test lamp light?

--

Go to step 7

Go to step 6

6

Repair open in circuit 1684 (ORN/BLK)

Is the repair complete?

--

Go to Brake Warning System Check

--

7

Repair open in circuit 351(BLK/WHT)

Is the repair complete?

--

Go to Brake Warning System Check

--

8

  1. Disconnect the park brake switch.
  2. Connect a test lamp between connector harness terminals A and ground.
  3. Turn the ignition switch to RUN.

Does the test lamp light?

--

Go to step 9

Go to step 10

9

Check the IPC brake indicator.

Does the brake indicator light?

--

Go to step 12

Go to step 13

10

Repair open in circuit 1134 (LT BLU). Refer to wiring repairs.

Is the repair complete?

--

Go to Brake Warning System Check

--

11

Replace brake fluid level switch. Refer to brake fluid level switch replacement.

Is repair complete?

--

Go to Brake Warning System Check

--

12

Replace park brake switch. Refer to park brake switch replacement.

Is repair complete?

--

Go to Brake Warning System Check

--

13

Replace IPC. Refer to IPC replacement.

Is repair complete?

--

Go to Brake Warning System Check

--