TM 9-2320-280-20-2
4-124. NBC CONTROL PANEL REPLACEMENT (Cont’d)
5. Remove two screws (12), lockwashers (13), and leads 782A (14) and 783 (16) from NBC control panel
circuit breaker (15). Discard lockwashers (13).
6. Remove nut and lockwasher assembly (11), diode (24), and leads 783A (17) and 783B (18) from NBC
control panel relay (19). Discard nut and lockwasher assembly (11).
NOTE
M996 and M996A1 ambulances have three leads, 785, 786, and
787, on NBC control panel relay.
7. Remove nut (5), lockwasher (6), and leads 784 (7), 787 (8) 785 (9), and 786 (10) from NBC control
panel relay (19). Discard lockwasher (6).
8. Remove nut (22), lockwasher (23), and leads 782 (21) and 782A (20) from NBC control panel relay (19).
Discard lockwasher (23).
9. Remove nut and lockwasher assembly (25), leads 795 (3), 796 (4), and 793 (2), and diode (24) from
NBC control panel relay ground (1). Discard nut and lockwasher assembly (25).
CAUTION
Use care when removing lead clips from NBC control panel fuse
block to prevent damage to leads, wire clips, and/or fuse block.
NOTE
For M997, M997A1 and M997A2 ambulances, perform steps 10
through 16 for removal of leads from NBC fuse block.
For M996 and M996A1 ambulances, perform steps 17 through
21 for removal of leads from NBC fuse block.
Leads 787.784. and 786 have two way jumpers connecting fuses
for heaters 4 & 5, 6 & 7, and 2 & 3 respectively.
10. Remove leads 787B (26) and 787 (8) from NBC fuse block (31) for heater fuse #4.
11. Remove lead 787A (27) from NBC fuse block (31) for heater fuse #5.
12. Remove leads 784 (30) and 784B (28) from NBC fuse block (31) for heater fuse #6.
13. Remove lead 784A (29) from NBC fuse block (31) for heater fuse #7.
14. Remove leads 785A (9) and 785 (34) from NBC fuse block (31) for heater fuse #1.
15. Remove lead 786A (33) from NBC fuse block (31) for heater fuse #2.
16. Remove lead 786 (32) and lead 786B (10) from NBC fuse block (31) for heater fuse #3.
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