Test Description
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to the step number on the diagnostic table.
- 7: If the fuse in the jumper opens when you perform this test, the signal circuit of the brake fluid level switch is shorted to voltage.
Brake Warning Indicator Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: CELL LINK Connector End Views Reference: Hydraulic Brake Connector End Views or CELL LINK or CELL LINK |
|||
| 1 | Did you review the hydraulic brakes operation and perform the necessary inspection? | Go to Step 2 | Go to Symptoms - Hydraulic Brakes |
| 2 | Inspect the brake fluid level. Is the brake fluid level OK? |
Go to Step 3 | Go to Brake Fluid Loss |
| 3 |
|
Go to Step 4 | Go to Step 5 |
| 4 | With a scan tool, observe the Brake Warning Lamp parameter in the IPC Inputs data list. Does the scan tool indicate that the Brake Warning Lamp parameter is ON? |
Go to Step 12 | Go to Step 6 |
| 5 |
|
Go to Step 9 | Go to Step 7 |
| 6 |
|
Go to Step 10 | Go to Step 8 |
| 7 |
|
Go to Step 17 | Go to Step 11 |
| 8 |
|
Go to Step 17 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the park brake warning lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 17 | Go to Step 13 |
| 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 17 | Go to Step 14 |
| 11 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 17 | Go to Step 15 |
| 12 | 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 17 | Go to Step 16 |
| 13 | Replace the park brake warning lamp switch. Refer to Park Brake Warning Lamp Switch Replacement
. Did you complete the repair? |
Go to Step 17 | - |
| 14 | Replace the brake fluid level switch. Refer to Master Cylinder Fluid Level Sensor Replacement . Did you complete the repair? |
Go to Step 17 | - |
| 15 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
Go to Step 17 | - |
| 16 | Replace the IPC. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
Go to Step 17 | - |
| 17 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |