1

Did you perform the Hydraulic Brake Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Hydraulic Brakes

1. Turn On the ignition, with the engine OFF.
2. Observe the brake warning indicator.

Does the brake warning indicator illuminate briefly during the bulb check?

Go to Step 3

Go to Step 13

1. Turn ON the ignition, with the engine OFF.
2. Apply the park brake.

Does the brake warning indicator illuminate?

Go to Step 4

Go to Step 5

Inspect the brake fluid level.

Is the brake fluid level OK?

Go to Step 6

Go to Brake Fluid Leak

1. Turn OFF the ignition.
2. Disconnect the park brake switch.
3. Connect a 3 amp fused jumper wire between the input circuit of the park brake switch and a good ground.
4. Turn ON the ignition, with the engine OFF.
5. With a scan tool, observe the Park Brake Switch parameter.

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

Go to Step 9

Go to Step 7

1. Turn OFF the ignition.
2. Disconnect the brake fluid level switch.
3. Connect a 3 amp fused jumper wire between the input circuit of the brake fluid level switch and a the ground circuit of the brake fluid level switch.
4. Turn ON the ignition, with the engine OFF.
5. With a scan tool, observe the Low Brake Fluid parameter.

Does the scan tool indicate that the Low Brake Fluid parameter is On?

Go to Step 12

Go to Step 8

1. Turn OFF the ignition.
2. Test the signal circuit of the park brake switch for a high resistance or a open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 13

Test the signal circuit of the brake fluid level switch for a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 10

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

Did you find and correct the condition?

Go to Step 17

Go to Step 11

Test the ground circuit of the brake fluid level switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 13

Inspect for poor connections at the harness connector of the park brake switch. 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 17

Go to Step 14

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 in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 15

Inspect for poor connections at the harness connector of the instrument 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 17

Go to Step 16

Replace the park brake switch. Refer to Parking Brake Lever Pedal Assembly Replacement in Park Brake.

Did you complete the replacement?

Go to Step 17

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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 17

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Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the replacement?

Go to Step 17

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2