The PBCM illuminates the PARK BRAKE indicator when the parking brake is applied. The PBCM illuminates the indicator by applying ground to the lamp.
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Park Brake System Schematics | |||
1 | Did you perform the Parking Brake Diagnostic System Check? | Go to Step 2 | |
2 |
Does the PARK BRAKE indicator turn ON? | Go to Diagnostic Aids | Go to Step 3 |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
4 | Inspect the PARK BRAKE indicator lamp for an open filament. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
Did you find and correct the condition? | Go to Step 10 | Go to Step 8 | |
6 | Inspect for poor connections at the harness connector of the instrument panel cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 7 |
7 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 10 | -- |
8 | Inspect for poor connections at the harness connector of the PBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
9 | Replace the PBCM. Refer to Park Brake Control Module Replacement . Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the PARK BRAKE indicator turn ON? | System OK | Go to Step 3 |
The Park Brake Indicator illuminates when ground is applied through the Park Brake Switch. The indicator also grounds through the ignition switch when the ignition switch is in the START position.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Park Brake System Schematics | |||
1 | Did you review the Park Brake Description and Operation? | Go to Step 2 | |
2 |
Does the Park Brake Indicator illuminate? | Go to Step 3 | Go to Step 5 |
3 |
Does the Park Brake lamp illuminate? | Go to Step 4 | Go to Step 5 |
4 | Test the Park Brake Indicator Ground Circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
5 | Test the Park Brake Indicator Control Circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
6 | Test the Ignition 1 Voltage Circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
7 | Replace the Instrument Panel Cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the Park Brake Switch. Refer to Parking Brake Indicator Switch Replacement . Did you complete the replacement? | Go to Step 9 | -- |
9 | Operate the system to verify the repair Does the system operate properly? | System OK | Go to Step 2 |