CHAPTER 6: MAINTENANCE OF ELECTRICAL SYSTEMS AND CIRCUITS
TM 9-2350-256-20
6-79 REPLACE/REPAIR APU CONTROL BOX TO FOOT DIMMER SWITCH AND
BULKHEAD WIRING HARNESS (DUAL VOLTAGE) (11672466)
THIS TASK COVERS
a. Removal
b. Disassembly
c. Assembly
d. Installation
INITIAL SET-UP
Tools:
Parts-Continued:
Tool kit, general mechanic's (Appendix C, item 53)
Lockwashers (4) (Appendix G, item 104)
Lockwashers (19) (Appendix G, item 118)
Parts:
Gasket (Appendix G, item 80)
Equipment Condition:
Lockwasher (Appendix G, item 116)
Air cleaner removed (see paragraph 4-24)
WARNING
Be certain MASTER switch is OFF when working on electrical systems to avoid electrical shock and burns.
Connector No.
Electrical Lead To:
Wire No.
1
APU control box
493, 420A, 421,
420, 419, 61A, 61,
65, 65, GND, 487
2
APU control box mounting bracket
GND
3
Switch panel to gage panel and miscellaneous switches wiring
419
harness (passive night viewer) (dual voltage) (12322547)
4
Gage panel to bulkhead wiring harness (dual voltage)
26
(12322587)
5
Rigger's light selector switch
17
6
Bulkhead disconnect
17, 420, 420A, 493,
421, 65, 487, 26, 65
7
Switch panel to neutral safety to bulkhead wiring harness
61A
8
Switch panel to neutral safety to bulkhead wiring harness
61
6-212
