TM 9-2350-247-20-3REPLACE ENGINE COOLANT HEATER CONTROL BOX — Continued 0474 00INSTALLATION1. Secure control box (8) to hull with four mounts (11), two washers (10), and new lock nuts (9).2. Secure ground lead (7) to control box (8) with two new lock washers (6) and screw (5).3. Connect circuit 400A lead (3) to connector (4).4. Connect wiring harness (1) to receptacle (2).FOLLOW-THROUGH STEPS1. Connect battery negative lead(s) (WP 0292 00).2. Start coolant heater (see your -10).3. Check coolant heater control box for proper operation.4. Stop coolant heater (see your -10).END OF TASK0474 00-2
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