TM 9-2320-209-20-3-4 23-19. HOT WATER PERSONNEL HEATER MOTOR RESISTOR REMOVAL AND REPLACEMENT. TOOLS: Flat-tip screwdriver SUPPLIES: Tags PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Disconnect battery ground cable. Refer to Part 1, para 7-58. b. Removal. FRAME 1 1. Using screwdriver, unscrew and take off two screws (1). Let heater motor resistor (2) hang down. NOTE Tag wires (3) so they can be put back in the same places. 2. Using screwdriver, unscrew and take off two screws (4) and two wires (3). 3. Take out heater motor resistor (2). END OF TASK 23-54