TM
5-5420-226-20-1
Symptom-65
T
DETAILED
TROUBLESHOOTING
PROCEDURE
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
(Continued)
Check rear accessory
harness (CKT 24) at taillight that
does
not work
for electrical
power.
Second
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
OFF.
First
and Second
Technicians
(Rear
Grille
Doors)
l Remove transmission
shroud
(page
9-2).
First
Technician
(Rear
Grille
Doors)
l Disconnect
rear
accessory
harness
connector
(CKT
24) from
taillight
assembly
that
does
not work.
l Set multimeter
to measure
18 to 30 volts
dc, or use
STE/ICE
Test
No.
89 (page
4-81).
l Connect
red probe
of meter
to rear
accessory
harness
(CKT
24) connector
and black
probe
to ground.
Second
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
ON.
First
Technician
(Rear
Grille
Doors)
l Check if meter indicates
18 to 30 volts dc.
Does meter
indicate
18 to 30 volts
dc?
#
?
o-
+
0
TO VEHICLE
GROUND
<
\
BACK
VIEW
LEFT
SIDE
CKT
24
SHOWN
RIGHT
SIDE
>J
Replace
socket
and wiring
assembly
(page
10-298).
?
J
CONTACT
4-638
l Inspect
rear accessory
harness
for bent/broken
connector
contact
or loose
CKT 24 wire at rear of
connector.
l Repair connector
if defective
(page
10-298).
l If connector
is not
defective,
notify
support
maintenance
of a defective
rear accessory
harness.
l Connect
rear accessory
harness
connector
(CKT 24)
to taillight
assembly.
l Install transmission
shroud
(page
9-6).
TA107327
