For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Brake Warning System Schematics Definition: Brake Warning Indicator Always On
1 | Did you review the brake warning system circuit description and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Hydraulic Brakes
2 | With the ignition switch ON, observe the brake warning indicator and perform a brake warning system test by meeting each of the conditions described in the circuit description. Did the brake indicator illuminate and turn off for each condition? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 | Disconnect the brake fluid level switch connector. Did the brake indicator turn off? | Go to Step 4 | Go to Step 5
4 | Replace the brake fluid reservoir (which contains the fluid level switch). Refer to Master Cylinder Reservoir Replacement . Did you complete the repair? | Go to Step 11 | --
5 | Disconnect the DRL control module connector. Did the brake indicator turn off? | Go to Step 7 | Go to Step 6
6 | Repair the short to ground in the brake indicator control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you correct the condition? | Go to Step 11 | --
7 |

1. Disconnect the park brake switch connector.
2. Test the park brake signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 8

8 | Test the park brake switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find the condition? | Go to Step 9 | Go to Step 10
9 | Replace the park brake switch. Refer to Park Brake Lever Assembly Replacement . Did you complete the repair? | Go to Step 11 | --
10 | Replace the DRL control module. Refer to Daytime Running Lights (DRL) Control Module Replacement in Lighting Systems. Did you complete the repair? | Go to Step 11 | --
11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3