BLACKOUT TAILLIGHT(S) DO NOT OPERATE. (Cont) -725550217

TM 9-2330-385-14

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical

circuits, a direct short may result. Damage to equipment, injury, or death to personnel may occur.

VOLTAGE TEST

(1) Loosen six captive screws and

remove composite light cover, and

preformed packing. Discard

preformed packing.

(2) Depress screw in center of blackout

taillight lamp and turn counter-

clockwise and remove blackout

taillight lamp.

(3) Set multimeter select switch to

volts dc.

(4) Connect positive (+) multimeter lead

to center contact of socket.

(5) Connect negative (--) multimeter lead

to a known good ground.

(6) While assistant turns ON ENGINE

switch and turns on BLACKOUT

LIGHTS selector switch, observe

multimeter (TM 9-2320-364-10).

(a) If 22 to 28 vdc are not present,

perform Steps (7) and (8) below

and go to Step 4 of this Fault.

(b) If 22 to 28 vdc are present,

perform Steps (7) and (8) below

and go to Step 3 of this Fault.

(7) Turn off BLACKOUT LIGHTS selector

switch.

(8) Turn OFF ENGINE switch.

CONTINUITY TEST

(1) Set multimeter select switch to ohms.

(2) Is there continuity between blackout

taillight socket ground and a known

good ground?

(a) If there is no continuity,

replace rear composite light

(Para 4-29).

(b) If there is continuity, replace

blackout taillight lamp (Para 4-29).

(3) Install blackout taillight lamp by

depressing screw in center of

blackout taillight lamp and turning

clockwise.

(4) Install preformed packing and

composite light cover, and tighten six

captive screws.

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