TM 9-2330-271-14&P
Section IV. MAINTENANCE PROCEDURES
3-9. Marker Clearance Light (fig. 7).
3-11.
Stoplight, Taillight Assembly (all
NOTE
models except XM822, XM844,
All 24-volt lights are controlled by the
XM845, XM847, XM848, XM849,
electrical system of the towing
XM850, XM912, XM913)
vehicle.
A master switch on the
a.
Lamp Removal (fig. 9)
towing vehicle controls the service
(1) Loosen six captive screws on door
and blackout modes of operation of
assembly (6).
Remove preformed packing (5) if
the lights. Place this switch in the
defective.
proper position prior to testing the
(2) Push in on lamp (4) or (7) and turn
lamps after installation. Lamps will
counterclockwise to remove. All taillight lamps are three
not illuminate if towing vehicle switch
candelpower, 24-to 28-volt lamps except the service stop
is in the OFF position.
lamp (4) which is a 32 candlepower 24- to 28-volt lamp.
b. Lamp Installation (fig. 9)
a.
Lamp Removal.
(1) Insert lamp (4) or (7) in socket, push in
(1) Remove two screws (2) which fasten body
and turn clockwise. Test service tail lamp (7) by turning
(3) of the clearance light to plate (7).
on service switch on towing vehicle. Operate brake
(2) Remove body (3) with lens (4) or (11)
pedal on towing vehicle to test stoplight lamp (4).
from plate (7).
Operate turn signal lever in towing vehicle to test
(3) Press
in
on
lamp
(6),
turning
operation of turn signal lamp (7). Test blackout lamp by
counterclockwise to remove from socket.
placing towing vehicle switch in the BLACKOUT mode of
b. Lamp Installation.
operation and then operating the proper switch, brake
(1) Insert lamp (6) into socket. Press in and
pedal or turn signal lever.
turn clockwise. Test lamp by turning on switch in towing
(2) Position preformed packing (5) and door
vehicle.
(6) on light body (2). Tighten the captive screws.
NOTE
The word BOTTOM is printed on
3-12.
Composite Stoplight-Taillight
blackout lens (11). Make certain lens
Assembly, XM822 (after serial no.
is positioned properly in body during
S2669), XM844, XM845, XM847,
installation.
XM848, XM849, XM850, XM912,
(2) Install body (3) with lens (4) or (11) over
XM913
lamp (6) and secure to mounting plate (7) with two
screws (2).
a.
Lamp Removal (fig. 10)
(1) Loosen six captive screws on lens
3-10.
Blackout Stoplight Assembly (all
assembly (2).
Remove preformed packing (3) if
models except XM822, XM844,
defective.
XM845, XM847, XM848, XM849,
(2) Push in on lamp (4), (5) or (12) and turn
XM850, XM912, XM913)
counterclockwise to remove.
b. Lamp Installation (fig. 10)
a.
Lamp Removal (fig. 8).
(1) Insert lamp (4), (5) or (12) in socket, push
(1) Remove two screws (11) which secure
in and turn clockwise. Test lamp following the procedure
door assembly (10) to housing (4) blackout stoplight Lift
of paragraph 3-11b (1).
off door assembly.
(2) Position preformed packing (3) and lens
(2) Push in on lamp (8) and turn
assembly (2) on body (11). Tighten captive screws.
counterclockwise to remove.
b. Lamp Installation (fig. 8).
3-13.
ICC Stoplight, XM654
(1) Insert lamp (8) in socket, push in, and turn
clockwise. Test lamp by turning on BLACKOUT switch
a.
Lamp Removal (fig 11).
in towing vehicle and depressing brake pedal.
(1) Carefully pry out retaining ring (7) and
(2) Note word TOP above lens and position
remove lens (6) and gasket (5).
door assembly (10) and gasket (9) on housing (4).
Secure with two screws (11).
3-11
