TM 10-3930-669-20 2-17.  BRAKE SYSTEM TROUBLESHOOTING (CONT). 3.  PARKING BRAKE DOES NOT ENGAGE OR DISENGAGE. INITIAL SETUP Tools and Special Tools Equipment Condition Tool Kit, General Mechanic's: Automotive Engine OFF (TM 10-3930-669-10) (Item 1, Appendix B) MAIN POWER switch OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) References Wheels chocked (TM 10-3930-669-10) TM 10-3930-669-10 KNOWN INFO POSSIBLE PROBLEMS Parking brake cable faulty. Parking brake adjustment incorrect. Parking brake pads faulty. TEST OPTIONS Visual inspection. REASON FOR QUESTION If parking brake cable is damaged, parking brake cable faulty. 2-414