Park Brake System Check Process

Notice: Use care when probing terminals to measure voltage and resistance values. The Digital Multimeter (DMM) probe can damage the connector terminal and cause a poor connection. A damaged terminal condition is very hard to diagnose.

Important: The amount of time it takes for the parking brake to release will vary based on the temperature and battery voltage. In extreme cold weather, it can take up to 15 seconds to release the parking brake. This is normal system operation.

Before beginning diagnosis on the Electric/Auto park brake system, you need a detailed description of when the condition occurred from the owner. This information can be useful in duplicating the condition. Always begin diagnosis with a visual inspection of all connectors, wiring, wire routing and retention, and system components. Many times a disconnected or loose connector, blown fuse, open circuit breaker, corroded terminal, or miss-routed wire is the cause of a malfunction. If you need additional information on wiring conditions, repair procedures or electrical component location, refer to Park Brake Will Not Release or Park Brake Pump Motor Runs Continuously .

Refer to Electric/Auto Park System Description or Electric/Auto Park System Operation for description and operation of the Electric/Auto Parking Brake.