For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Hydraulic Brake Schematics Connector End View Reference: Hydraulic Brake Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Turn ON the ignition, with the engine OFF.
2. Release the park brake.
3. With a scan tool, observe the Park Brake Switch parameter in the body control module (BCM) data list.

Does the scan tool indicate that the Park Brake Switch parameter is Off?

Go to Step 5

Go to Step 3

3 |

1. Turn OFF the ignition.
2. Disconnect the park brake switch.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool, observe the Park Brake Switch parameter.

Does the scan tool indicate that the Park Brake Switch parameter is Off?

Go to Step 6

Go to Step 4

4 | Test the park brake switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 7
5 | Replace the instrument panel cluster (IPC). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | --
6 | Replace the park brake switch. Refer to Parking Brake Lever Replacement . Did you complete the repair? | Go to Step 8 | --
7 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | --
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2