Normal Operation

When the parking brake release handle is pulled, the ratchet mechanism and return spring in the parking brake control release the tension on the parking brake cables and conduits. The cable conduits, cable springs and parking brake shoe springs provide the force necessary to return the parking brake system to the released position.

This pinpoint test is intended to diagnose the following: 

• Parking brake cable(s)
• Parking brake control
• Parking brake control release handle
• Parking brake shoe actuators
• Parking brake shoes and hardware