For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Hydraulic Brake Schematics Connector End View Reference: Antilock Brake System Connector End Views or 50850
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Turn OFF the ignition.
2. Key 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

3 | Set parking brake. Does the red brake indicator illuminate? | Go to Step 4 | Go to Step 5
4 |

1. Turn OFF the ignition.
2. Release the parking 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. Key on, engine off.

Does the red brake indicator illuminate?

Go to Step 10

Go to Step 7

5 |

1. Turn OFF the ignition.
2. Disconnect the parking brake switch.
3. Connect a 3-amp fused jumper wire between the signal circuit of the parking brake switch and a good ground.
4. Key on, engine off.

Does the red Brake indicator illuminate?

Go to Step 9

Go to Step 6

6 | Test the signal circuit of the parking 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
7 | 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
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
9 | Inspect for poor case 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
10 | 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
11 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). 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
12 | Replace the park brake switch. Refer to Parking Brake Indicator Switch Replacement . Did you complete the replacement? | Go to Step 15 | --
13 | Replace the brake fluid level switch. Refer to Brake Fluid Level Indicator Switch Replacement . Did you complete the replacement? | Go to Step 15 | --
14 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | --
15 | Operate the vehicle in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2