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Page Title: REAR SIDE MARKER LIGHTS, REAR MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE (Cont)
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TM 9-2330-385-14
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
S
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
Resistors mounted on exterior of junction box assembly reach very high temperature when power is
S
applied to circuit. Avoid touching or contacting resistors when working in or around junction boxes.
Failure to comply could result in injury to personnel.
VOLTAGE TEST
(1) Remove four locknuts and rear
junction box guard. Discard locknuts.
(2) Loosen four captive screws and
remove rear junction box assembly
cover.
(3) Connect positive (+) multimeter lead
to rear junction box cover assembly
terminal 21.
(4) Connect negative (--) multimeter lead
to a known good ground.
(5) While assistant turns ON ENGINE
switch and turns on lights, observe
multimeter (TM 9-2320-364-10).
(a) If 22 to 28 vdc are not present at
rear junction box assembly,
terminal 21, perform Steps (6)
and (7) below and repair wire
1008C-21 (see schematic, Fig
FO-1) or replace wire harness
(b) If 22 to 28 vdc are present, wire
1008C-21 is OK.
(6) Turn off lights.
(7) Turn OFF ENGINE switch.
VOLTAGE TEST
(1) Connect positive (+) multimeter lead
to rear junction box assembly,
terminal 29.
(2) Connect negative (--) multimeter lead
to a known good ground.
(3) While assistant turns ON ENGINE
switch and turns on lights, observe
multimeter (TM 9-2320-364-10).
(a) If 22 to 28 vdc are not present at
terminal 29, perform Steps (4)
and (5) below and replace rear
junction box assembly
(b) If 22 to 28 vdc are present at rear
junction box assembly is OK.
(4) Turn off lights.
(5) Turn OFF ENGINE switch.
(6) Install rear junction box assembly
cover and tighten four captive screws.
(7) Install rear junction box guard and
four locknuts.

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