TM 9-2320-209-20-3-3 18-73. 24-VOLT AND 115-VOLT VAN REAR DOOR BLACKOUT SWITCHES REMOVAL AND REPLACEMENT. TOOLS: Flat-tip screwdriver 9/16-inch wrench (2) SUPPLIES: Tags PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedures. (1) Disconnect external power cables. Refer to TM 9-2320-209-10. (2) Disconnect battery ground cable. Refer to Part 1, para 7-58. b. Removal. FRAME 1 1. Using screwdriver, unscrew and take off four screws (1). 2. Take off cover (2). GO TO FRAME 2 18-389