TM 9-2320-361-20 14-3. PERSONNEL HEATER CONTROL BOX REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS All REFERENCES (TM) TM 9-2320-361-10 MATERIALS/PARTS TM 9-2320-361-20P Two lockwashers EQUIPMENT CONDITION Parking brake set (TM 9-2320-361-10). Battery ground cable disconnected (para. 4-48). NOTE This procedure is the same for the engine coolant heater control box. 1. Disconnect wiring harness (4) from control box (7). 2. Disconnect wire (6) from wire (5). 3. Remove two nuts (2), lockwashers (1), and control box (7) from bracket (3). Discard lockwashers (1). 1. Install control box (7) on bracket (3) with two new lockwashers (1) and nuts (2). 2. Connect wire (6) to wire (5). 3. Connect wiring harness (4) to control box (7). FOLLOW-ON TASK: Connect battery ground cable (para. 4-48). 14-3