TM
9-2320-363-20-1
Table 3-1.
Troubleshooting
(Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Utility Light Circuits
1.
NEITHER
UTILITY
LIGHT
OPERATES.
Step
1.
Inspect
light bulbs.
.
Replace
if broken or defective
(page 4-224).
and 73 from 15A fuse. Check for continuity between
Step 2.
Disconnect
leads 420JD
contacts
of 15A fuse.
.
If continuity is indicated,
go to step 3. If no continuity is
indicated, replace
15A fuse
(page 4-204).
Step 3.
Check
for +12 VDC
at lead 420JD
from auxiliary
light power bus.
.
If +12
VDC is present,
go
to
step
4.
If no
voltage
is
present,
repair
lead
420JD
(page
3-2).
Step 4.
Disconnect
lead 73 from utility light switch. Check for +12 VDC
at lead 73.
.
If +12 VDC is present, go to step 5. If no voltage is present,
repair lead 73 (page 3-2).
Step 5.
Disconnect
lead 73B from utility light switch. Activate switch. Check for
continuity between
switch
contacts.
.
If continuity is indicated,
repair lead 73B (page 3-2).
If no
continuity is indicated,
replace
utility light switch (page 4-188).
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