TM 9-2350-256-20
CHAPTER 6: MAINTENANCE OF ELECTRICAL SYSTEMS AND CIRCUITS
6-75 REPLACE/REPAIR BULKHEAD TO AUXILIARY POWER UNIT (APU),
MASTER RELAY, AND RIGGER'S LIGHTS WIRING HARNESS (DUAL VOLTAGE)
(1167241 2)-Continued
12 Connect two connectors (1 and 14) to bulkhead
disconnect (20).
13 Install 20 clamps (17) using new lockwasher (19)
and screw (18) for each.
NOTE
Follow-on maintenance: Install air inlet doors
(see paragraph 9-56)
6-76 REPLACE/REPAIR BULKHEAD TO APU, MASTER RELAY, AND RIGGER'S
LIGHTS WIRING HARNESS (SINGLE VOLTAGE) (11671324)
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 105)
Lockwashers (10) (Appendix G, item 116)
Parts:
Lockwashers (4) (Appendix G, item 103)
Equipment Condition:
Air inlet grilles removed (see paragraph 9-56)
WARNING
Be certain MASTER switch is OFF when working on electrical systems to avoid electrical shock and bums.
Connector No.
Electrical Lead To:
Wire No.
1
Bulkhead disconnect
420, 420A, 493, 421, 65,
487, 65, 514, 17, 26
2
APU engine disconnect
420, 420A, 493
3
APU engine disconnect
421, 65, 487, 66, 65,
62, 478A, 61
4
Hydraulic pressure switch
J
5
Hydraulic pressure switch
H
6
Switching relay box
H, 61, 478A
7
Main engine generator relay
62
8
Rigger's right service light
514
9
Rigger's left service light
17
10
Bulkhead to main engine wiring harness and starter relay
26
wiring harness
11
Bulkhead to main engine wiring harness and starter relay
J
wiring harness
6-200