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 TM 5-1940-277-20
TM 1940-20/2
REPLACEMENT AND TEST INSTRUCTIONS
TOOLS: Multimeter URM 105
6 In. Crosstip Screwdriver
1 1/4 In. Open End Wrench
Adjustable Wrench
Nut Driver Set
PARTS/MATERIALS: Cable Harnesses and + and - Power Leads
REMOVE:
1.
Refer to paragraph 1-17 and remove power from circuit.
2.
Refer to paragraph 3-50 and remove switch panel unit 1 (1) with cable harnesses and power leads from control console.
3.
Using crosstip screwdriver, remove eight screws (2) that secures rear cover (3) to switch panel and separate rear
cover from switch panel unit 1 (1).
4.
Using open end wrench and adjustable wrench loosen and unscrew hex nuts from cable glands (4) and (5) from rear
cover (3).
5.
Tag and using flat tip screwdriver disconnect leads from switch terminals row two and carefully remove leads from
rear cover (3) of panel through cable glands (5).
Tag and using box-end wrench disconnect + (6) and - (7) leads from terminals (8) on rear cover (3). Remove leads
6.
from rear cover (3) of panel through cable glands (4).
TEST
Refer to paragraph 3-153 and set multimeter for Ohms and test all wiring harness leads and power leads for continuity.
1.
2.
If continuity test fails, replace wiring harness with a serviceable wiring harness.
3-123
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