TM 5-4930-244-14
4-46. HEATER WIRING HARNESS - TEST/REPLACE.
This Task Covers:
a. Test
b. Removal
c. Installation
Initial Setup:
Tools Required
Tool Kit, General Mechanic's: Automotive (Appendix B, Section III, Item 1).
Multimeter (Appendix B, Section III, Item 2).
Materials/Parts Required
Tags (Appendix E, Section II, Item 17).
Tape, Electrical (Appendix E, Section II, Item 18).
Equipment Condition
Unit shut down and cool.
Control Box Removed (para. 4-45)
WARNING
·
Prevent electrical shocks or burns. DO NOT wear jewelry or dog tags when
working on electrical components
a. Test. (Refer to Figure 4-46).
Using a multimeter, perform continuity tests on all wires. Replace wires with no continuity.
NOTE
·
Wires are already tagged and numbered.
·
In the procedures below, tag numbers are preceded by a “#” symbol.
Illustration numbers are in parentheses.
b. Removal.
(1)
Disconnect two electrical connectors (1). (para. 4-45).
(2)
Remove control box (2) (para. 4-45).
(3)
Remove locknut (3) and wire #36 (4) from circuit breaker ground (5).
(4)
Remove hex nut (6), lockwasher (7) and wire #30 (8) and wire #31 (9) from brass colored screw of circuit breaker
(5).
(5)
Remove wire #40 (10) from "high" terminal of low-high switch (11).
(6)
Remove wire #39 (50) from "low" terminal of low-high switch (11) and "start" terminal of start-off-run switch (12).
(7)
Remove wire #38 (13) from "start" terminal of start-off-run switch (12).
(8)
Remove wire #37 (14) from "off' terminal of start-off-run switch (12).
(9)
Remove hex nut (6), lockwasher (7) and wire #29 (15) from silver colored screw of circuit breaker (5).
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