TM 9-2320-209-10-2 Table 1-5. Operator/ Crew Preventive Maintenance Checks and Services for M109A2, M109A3, M185A2 and M185A3 Shop Van and Instrument Repair Trucks - Cont NOTE : These checks are to 1 (cont) B-Before operation D-During operation ● ● ● ● ● ● ● be made in the order listed, within designated interval. A-After operation W-Weekly M-Monthly b. Check that the following front panel items are not loose or damaged: Dome light switch (1) Converter selector switch (2) Exhaust blower switch (3) Red light (4) Power switch handle (5) Circuit breaker box (6) 1-24