TM
9-2320-363-20-1
Table 3-1.
Troubleshooting
(Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Marker and Taillight Circuits (Cont)
3.
RIGHT
FRONT
MARKER
LIGHT
NOT
OPERATING.
Step
1.
Step
2.
Step 3.
Step 4.
4.
ONE
OR MORE
Step
1.
Step 2.
Step 3.
Inspect
light bulb.
l
Replace if broken or defective (page 4-214).
Remove
lamp from socket (page 4-214).
Check for continuity between
contacts
of lamp.
•
If continuity
is indicated,
go to step 3. If no continuity is
indicated,
replace
lamp (page 4-214).
Check
for continuity
between
socket and ground.
•
If continuity
is indicated,
go to step 4. If no continuity is
indicated,
repair ground lead (page
3-2).
Disconnect
lead 46F
from lead 46.
Check for +12 VDC at lead 46.
.
If +12
VDC
is present,
repair lead 46E
(page 3-2).
If no
voltage
is present,
repair lead 46 (page 3-2).
CAB
MARKER
LIGHTS
NOT OPERATING.
Inspect
light bulbs.
.
Replace
if broken or defective
(page 4-226).
Remove
lamp(s)
from defective
circuit(s)
(page
4-226).
Check for continuity
between
socket
and ground.
.
If continuity
is indicated,
go to step 3. If no continuity is
indicated,
replace
lamp(s)
(page 4-226).
Disconnect
ground
lead from marker light(s).
Check for continuity between
ground
5.
BOTH
TAILLIGHTS
NOT
Step
1.
Inspect
lead(s)
and ground.
.
If continuity
is indicated,
repair lead(s)
46 (page 3-2).
If no
continuity
is indicated,
repair ground lead(s)
(page 3-2).
OPERATING,
ALL MARKER
LIGHTS
OPERATING.
light bulbs.
.
Replace
if broken or defective
(pages
4-220,
4-222).
Step
2.
Disconnect
lead 23A from taillight terminal.
Check for +12 VDC
at lead 23A.
.
If +12
VDC
is present,
repair terminal
connector (page
3-2).
If
no voltage
is present,
repair lead 23A (page 3-2).
3-36
