TM 9-2350-287-20-12-19. TROUBLESHOOTING CHART (continued).o.PERSONNEL VENTILATION BLOWER (continued).(1) PERSONNEL VENTILATION BLOWER DOESNOT OPERATE. All other electrical componentsoperate (continued).CONTINUED FROM DD. 9. Check for 24 ± 3 vdc.10. Turn MASTER switch OFF (refer to TM 9-2350-287-10).Is voltage present on both circuits?Repair wire 159C or replace harness12351461 (para 7-79). Verify problem issolved.E. 1. Remove accessory control box (para 7-10).2. Remove 12 nuts, 12 Iockwashers, 12 flatwashers, 12 screws, cover and gasket fromcontrol box.3. Check ventilator blower switch for conti-nuity of the lNTAKE circuit between pin 5 andpin 1 with the switch in the up (INTAKE)position.4. Check ventilator blower switch for conti-nuity of the EXHAUST circuit between pin 5and pin 3 with the switch in the down (EX-HAUST) position.Is there continuity in both INTAKE and EXHAUSTcircuits?Replace ventilator blower switch (para 7-9).Verify problem is solved.F. Check PERSONNEL VENTILATOR BLOWERRESET switch for continuity by placing redlead of multimeter on first pin of switch andblack lead of muttimeter on remaining pin ofswitch, toggle RESET switch.Continued on next page2-252
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