Brake Warning Indicator Inoperative
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, 2004 Chevrolet Cab & Chassis Silverado, and 2003 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
Brake Warning Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Brake Warning System Schematics Connector End View Reference: Hydraulic Brakes Connector End Views |
|||
| 1 | Did you review the Brake Warning System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Hydraulic Brakes |
| 2 | Verify a fault is present. Does the system operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 15 |
| 4 |
|
Go to Step 5 | Go to Step 6 |
| 5 |
|
Go to Step 12 | Go to Step 7 |
| 6 |
|
Go to Step 11 | Go to Step 8 |
| 7 | Connect a fused jumper wire between the brake fluid level switch output circuit and a good ground. Does the brake warning indicator illuminate? |
Go to Step 9 | Go to Step 10 |
| 8 | Test park brake switch output circuit for an open between the park brake switch and the BCM. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 13 |
| 9 | Repair the open in the ground circuit of the brake fluid level switch. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 16 | - |
| 10 | Test the brake fluid level switch input circuit for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 14 |
| 11 | Replace the park brake switch. Refer to Park Brake Warning Lamp Switch Replacement
in Park Brake. Did you complete the replacement? |
Go to Step 16 | - |
| 12 | Replace the brake fluid level switch. Refer to Master Cylinder Reservoir Replacement . Did you complete the replacement? |
Go to Step 16 | - |
| 13 |
IMPORTANT:
Perform the set up procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Did you complete the replacement? |
Go to Step 16 | - |
| 14 |
IMPORTANT:
Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement
in Antilock Brake System.Did you complete the replacement? |
Go to Step 16 | - |
| 15 | Replace the instrument panel cluster. Refer to Instrument Panel Cluster (IPC) Replacement
in Instrument Panel, Gages, and Console. Did you complete the replacement? |
Go to Step 16 | - |
| 16 | Verify the system is repaired. Does the system operate normally? |
System OK | Go to Step 3 |