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Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - BRAKE INDICATOR ALWAYS ON

TEST ACTION APPLICABILITY
1
NOTE: Ensure that the Brake Fluid Level is properly filled and the Brake Fluid Level Switch harness connector is properly connected.
With the DRBIII®, erase DTCs.Cycle the ignition and wait approximately 15 seconds.With the DRBIII®, read DTCs.Does the DRBIII® display "BRAKE FLUID LEVEL SWITCH CIRCUIT OPEN?Yes --> Refer to "BRAKE FLUID SWITCH CIRCUIT OPEN ".No --> Go To 2		 All
2 Turn the ignition off.
Disconnect the Brake Fluid Level Switch harness connector.
Measure the resistance of the Brake Fluid Level Switch.
Is the resistance below 900 ohms?
Yes --> Replace the Brake Fluid Level Switch in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 3		 All
3 Turn the ignition off.
Disunite the Brake Fluid Level Switch harness connector.
Disconnect the Instrument Cluster harness connector.
Measure the resistance between ground and the Red Brake Warning Indicator Driver circuit.
Is the resistance below 5.0 ohms?
Yes --> Repair the Red Brake Warning Indicator Driver circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 4		 All
4
NOTE: Ensure that the Brake Fluid Level Switch and Instrument Cluster harness connectors are properly connected.
Disconnect the Park Brake Switch harness connector.With the DRBIII® in Inputs/Outputs, read the Park Brake Switch state.Does the DRBIII® display "Open"?Yes --> Replace the Park Brake Switch in accordance with the Service Information.Perform BODY VERIFICATION TEST - VER 1  .No --> Go To 5		 All
5 Turn the ignition off.
Disconnect the Park Brake Switch harness connector.
Disconnect the Instrument Cluster harness connector.
Measure the resistance between ground and the Park Brake Switch Sense circuit.
Is the resistance below 5.0 ohms?
Yes --> Repair the Park Brake Switch Sense circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Replace and configure the Instrument Cluster in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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