Schematic Reference: Brake Warning System Schematics

Connector End View Reference: Component Connector End Views .

Did you perform the Diagnostic System Check-Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle .

Inspect the brake fluid level.

Is the brake fluid level OK?

Go to Step 3

Go to Hydraulic Brake System Bleeding .

1. Turn the ignition ON engine OFF .
2. Release the park brake.
3. With a diagnostic scan tool, observe the Park Brake Switch parameter in the BCM Chassis data list.

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

Go to Step 4

Go to Step 5

With a diagnostic scan tool, observe the Brake Fluid Switch parameter in the Instrument Panel Cluster data list.

Does the diagnostic scan tool indicate that the Brake Fluid Switch parameter is OFF?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 6

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

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

Go to Step 9

Go to Step 7

1. Turn the ignition OFF .
2. Disconnect the brake fluid level switch electrical connector.
3. Turn the ignition ON, engine OFF .
4. With a diagnostic scan tool, observe the Brake Fluid Level parameter.

Does the diagnostic scan tool indicate that the Brake Fluid Switch parameter is OPEN?

Go to Step 10

Go to Step 8

Test the signal circuit of the park brake switch for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 15

Go to Step 11

Test the signal circuit of the brake fluid level switch for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 15

Go to Step 11

Inspect for poor connections at the harness connector of the park brake switch. Refer to Testing for Intermittent Conditions and Poor Connections s and Connector Repairs .

Did you find and correct the condition?

Go to Step 15

Go to Step 12

Inspect for poor connections at the harness connector of the brake fluid level switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 15

Go to Step 13

Inspect for poor connections at the harness connector of the Instrument Cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 15

Go to Step 14

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

Did you complete the replacement?

Go to Step 15

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Replace the brake fluid level switch. Refer to Master Cylinder Reservoir Replacement .

Did you complete the replacement?

Go to Step 15

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Replace the Instrument Cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 15

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2