Diagnostic Test

1) BRAKE WARNING INDICATOR SWITCH

Fig 1: Checking Switch
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Brake Fluid Level Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Connect a jumper wire between cavity 1 and cavity 2 of the Brake Fluid Level Switch harness connector.

Turn the ignition on.

Is the Brake Warning Indicator lamp on?

Yes
1. Replace the Brake Fluid Level Switch. (Refer to BRAKES/ELECTRICAL/BRAKE FLUID LEVEL SWITCH - REMOVAL) .
2. Perform BODY VERIFICATION TEST .
No
1. Go to step 2).
2) MEASURE BRAKE WARNING INDICATOR CIRCUIT RESISTANCE

Fig 2: Checking Indicator Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Instrument Cluster C1 harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Connect a jumper wire between cavity 1 and cavity 2 of the Brake Fluid Level Switch harness connector.

Measure the resistance between ground and the Brake Warning Indicator circuit.

Is the resistance below 5.0 ohms?

Yes
1. Check the Brake Warning Indicator lamp. If the lamp is OK, replace the Instrument Cluster. (Refer to ELECTRICAL/INSTRUMENT CLUSTER - REMOVAL) .
2. Perform BODY VERIFICATION TEST .
No
1. Repair the Brake Warning Indicator circuit for an open.
2. Perform BODY VERIFICATION TEST .