TM 9-6115-658-13&P 2-17 Table 2-2.  Operator Preventive Maintenance Checks and Services – (continued) ITEM NO. INTERVAL LOCATION PROCEDURE NOT FULLY MISSION CAPABLE IF: ITEM TO CHECK/SERVICE 17 Before CONTROLS AND INDICATORS PANEL a. Check all indicators and controls for damage or missing parts. b. Generator start switch (29) should be in “RUN” position. c.  Press PUSH TEST RESET LAMPS button (30) on fault indicator.  All lights must light. d. Return switch (29) to stop position. Indicators or controls damaged or missing. 18 Before CONTROL BOX HARNESS Open control and indicator panel.  Check inside control box for loose or damaged wiring. Loose or damaged wiring. TRAILER 19 During OPERATION a. Be alert for any unusual noises while             towing the trailer.  Stop and investigate any unusual noises. b. Ensure that the trailer is tracking/following correctly behind towing vehicle with no side pull. 20 During SWITCH BOX ASSEMBLY Check indicator lights.  Ensure indicator   Lights are operating properly.