TM 5-3805-262-20
3-11. LIGHT SYSTEMS TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. SERVICE TAIL LIGHTS DO NOT OPERATE (Cont).
S t e p 2 . ( C o n t ) .
a. Repair or replace wire or connector as necessary (page 5-168 or
5-174).
b. If wiring and connectors are okay, remove right instrument panel
(page 5-48) and replace vehicle lights switch (page 5-53).
Step 3. Disconnect wiring harness pink wire terminal from tail light red
wire terminal by grasping both terminals with your fingers and
firmly pulling them apart.
Connect multimeter between wiring harness terminal and chassis
frame.
Multimeter should indicate 24 volts.
a. If multimeter indicates 24 volts, connect terminals by grasping
both terminals with your fingers, alining, and firmly pushing
them together. Go to step 4 below.
b. If multimeter indicates zero, check wiring connection at pink
wire terminal. Repair or replace wiring or terminal as necessary
(page 5-174).
Step 4.
Place ignition key switch in off position.
Disconnect wiring harness black wire terminal from tail light black
wire terminal by grasping both terminals with your fingers and firm-
ly pulling them apart.
Connect multimeter between wiring harness terminal and chassis
frame.
Multimeter should indicate continuity.
a. If multimeter indicates continuity, replace lamp (page 5-105).
Connect black wire terminals by grasping both terminals with
your fingers, alining, and firmly pushing them together. If tail
l i g h t s t i l l d o e s n o t o p e r a t e , r e p l a c e t a i l l i g h t a s s e m b l y ( p a ge
5-105).
b. If multimeter does not indicate continuity, check wiring harness
connection between black wire terminal and chassis frame. Repair
or replace wiring or terminal as necessary (page 5-168 or
5-174).
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