TM 9-2320-361-34 15-27. SAFETY SWITCH BOX REPLACEMENT (Contd) 3. 4. 5. NOTE Perform step 3 for M109A3 vehicles. Loosen four screws (6) and remove two wires (7) and wires (8) from safety switch box (2). NOTE Perform steps 4 and 5 on M185A3 vehicles. Loosen four screws (6) and remove two wires (9), wires (10), and wires (11) from safety switch box (2). Remove three screws (13) and three wires (12) from start/stop switch (14). 15-105