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 TM 5-4930-233-14
TM 4930-14/1
WINTERIZATION ASSEMBLY
4-40. CONTROL BOX- TEST/REPLACE
This task covers:
a. Test
b. Removal
c. Installation
INITIAL SET-UP:
General Safety Instructions
Tools
General Mechanics Tool Box
(Section III, Item 1, AppB)
WARNING
When working on electrical compo-
nents remove all jewelry, dogtags,
and metal items to avoid electrical
shock and burns.
a. Test
(1)
See the continuity chart (Table 4-4) and wiring diagram and check continuity at pins and connections as
indicated.
(2)
If the control box is defective, replace.
Table 4-4. Wiring Diagram
SWITCH
MULTIMETER LEAD CONNECTIONS
POSITION
LEAD 1
LEAD 2
READING
Heat Switch High
Pin E
Pin B
0
Heat Switch Low
Pin E
Pin B
---
Control Switch Off
Pin A
Pin C
---
Control Switch Start
Pin A
Pin C
0
Control Switch Off
Pin A
Pin D
---
Control Switch Start
Pin A
Pin D
0
Control Switch Off
Pin C
Pin E
---
Control Switch Run
Pin C
Pin E
0
Light-Pressed to Test
Pin D
Pin E
0
Light
Pin E
Box Enclosure
0
Pin D
Connector Wire 400
4-120
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