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 TM 5-1940-277-20
TM 1940-20/2
TOOLS: 6 In. Crosstip Screwdriver
1 1/4 In. Open End Wrench
Adjustable Wrench
Nut Driver Set
PARTS/MATERIALS: Junction Box Unit 2
REMOVE
1.
Switch master switch off (refer to paragraph 1-17).
2.
Open access panel under control console. (Refer to paragraph 3-154).
3.
Using crosstip screwdriver, remove four screws (1) that secures junction box unit 2 cover (2) to junction box unit 2 (3)
and remove the cover.
4.
At junction box unit 2 (3) use open end wrench and adjustable wrench to loosen and unscrew cable glands (4) where
switch panel unit 2 (5) wiring harness leads (6), (7), and (8) enters junction box unit 2 (3).
5.
Tag and dinned switch panel unit 2 (5) wiring harness lead (6), (7), and (8) from quick disconnect receptacles (9)
in junction box unit 2 (3).
6.
Tag and carefully pull switch panel unit 2 (5) wiring harness leads (6), (7), and (8) from junction box unit 2 (3).
7.
Use open end wrench and adjustable wrench to loosen and unscrew cable gland hex nuts (10) where wiring
harness (11) to forward terminal block enters junction box unit 2 (3).
Tag and disconnect wiring harness leads (11) from quick disconnect receptacles (9) in junction box unit 2 (3).
8.
Tag and carefully remove the forward terminal block wiring harness leads (11) from junction box unit 2 (3).
9.
10.
Using box end wrench and crosstip screwdriver, remove two nuts (12), washers (13), and screws (14), that secures
junction box unit 2 (3) to access panel door.
11.
Remove junction box unit 2 (3) from hinged access panel.
12.
Disconnect and remove the two jumper leads (15) from quick disconnect receptacle terminal pairs 9-10 and 11-12
and retain jumper leads for installation of new junction box unit 2.
3-119
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