TM 5-4930-244-14
4-58. VOLTAGE REDUCER BOX - 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 II, 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.
a.
Test.
Perform continuity tests on all wires Replace or repair wires with no continuity.
b.
Removal. (Refer to Figure 4-58).
(1)
Disconnect 12V intervehicular harness (1) and 24V intervehicular harness (2) power plugs from front of voltage
reducer box (3).
(2)
Loosen two screws (4) and two latches (5) on bottom of voltage reducer box (3).
(3)
Tag and identify ten trailer harness wires (6). Disconnect trailer harness wires (6) inside of voltage reducer box
(3).
(4)
Loosen Harness guide nut (7) on bottom of voltage reducer box (3).
(5)
Remove trailer harness wires (6) from voltage reducer box (3).
(6)
Remove four bolts (8), and locknuts (9).
(7)
Remove voltage reducer box (3) from trailer (10).
c.
Installation.
(1)
Hold voltage reducer box (3) in place on trailer (10) and install four bolts (8) and four nuts (9). Tighten nuts (9).
(2)
Install trailer harness wires (6) into voltage reducer box (3).
(3)
Tighten harness guide nut (7) on bottom of voltage reducer box (3).
(4)
Connect trailer harness wires (6) inside of voltage reducer box (3) Remove tags from trailer harness wires (6).
(5)
Tighten two screws (4) and two latches (5) on bottom of voltage reducer box (3).
(6)
Replace 12V intervehicular harness (1) and 24V intervehicular harness (2) power plugs to voltage reducer box (3)
or to u-bracket on trailer (10), as appropriate.
4-175
