Schematic Reference: Brake Warning System Schematics

Connector End View Reference

Component Connector End Views

Did you perform the Diagnostic System Check [dash ] Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle .

1. Turn the ignition OFF.
2. Turn the ignition ON , engine OFF.
3. Observe the red Brake indicator.

Does the red Brake indicator illuminate briefly during the displays test?

Go to Step 3

Go to Step 11

Apply the park brake.

Does the red Brake indicator illuminate?

Go to Step 4

Go to Step 5

1. Turn the ignition OFF .
2. Release the park brake.
3. Disconnect the brake fluid level switch.
4. Connect a 3 amp fused jumper wire between the signal circuit of the brake fluid level switch and the ground circuit of the brake fluid level switch.
5. Turn the ignition ON, engine OFF.

Does the red Brake indicator illuminate?

Go to Step 10

Go to Step 7

1. Turn the ignition OFF.
2. Disconnect the park brake switch.
3. Connect a 3 amp fused jumper wire between the signal circuit of the park brake switch and a good ground.
4. Turn the ignition ON, engine OFF.

Does the red Brake indicator illuminate?

Go to Step 9

Go to Step 6

Test the signal circuit of the park brake switch for a high resistance or a open. 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 high resistance or a open. Refer to Circuit Testing and Wiring Repairs

Did you find and correct the condition?

Go to Step 15

Go to Step 8

Test the ground circuit of the brake fluid level switch for a high resistance or an open. 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 ground or poor connections at the harness connector of the park brake 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 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 Brake Fluid Level Indicator Switch Replacement

Did you complete the replacement?

Go to Step 15

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Replace the Instrument Cluster. Refer to Control Module References .

Did you complete the replacement?

Go to Step 15

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Operate the vehicle in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2