2-19. TROUBLESHOOTING CHART (continued).
x. NBC SYSTEM (continued).
(1) NO FAN OPERATION FROM M2A2 AIR PURIFIER
UNIT (continued).
CONTINUED FROM E
Repair wire 10 or replace wire harness
12376405 (para 7-57). Verify problem is solved.
F.
1. Reconnect wire harness 12376405 to
driver's bulkhead.
2. Disconnect wire harness 12353403 from
master relay.
3. Place red lead of multimeter on master
relay pin and ground black lead.
4. Turn MASTER switch ON (refer to TM 9-
2350-287-10).
5. Check for 24 ± 3 vdc.
6. Turn MASTER switch OFF (refer to TM 9-
2350-287-10).
Is voltage indicated?
Repair wire 82 or replace wire harness
12353403 (para 7-49). Verify problem is
solved.
G. 1. Reconnect wire harness 12353403 to
master relay.
WARNING
Wire 81 is a live wire with 24 vdc. Take
appropriate precautions (refer to TM 9-
2350-287-10).
2. Disconnect wire harness 12353401 from
master relay.
Continued on next page
2-371
TM 9-2350-287-20-1
