TM 9-2320-273-20
Table 5-9. Marker Lamps Circuit Troubleshooting.
INSTRUCTION
INDICATION
I YES
I NO
I REMARKS
1
2
3
4
Tighten.
Repair.
FRONT MARKER LAMPS INOPERATIVE.
If none of the front
Loose connection.
Tighten.
marker lamps operates Broken wire.
Repair.
check wiring from the
switch.
INTERMEDIATE MARKER LAMPS INOPERATIVE.
If neither of the side
Loose connection.
Tighten.
marker lamps operate,
Broken wire.
Repair.
check wiring from the
switch.
REAR MARKER LAMPS INOPERATIVE.
If none of the rear
Loose Connection.
marker lamps oper-
Broken wire.
ates, check wiring
from the switch.
ALL MARKER LAMPS INOPERATIVE.
Check for voltage at
12 volts dc nominal.
Trouble-
both switch terminals
shoot wiring.
using multi meter.
Replace any
single lamp
that is inop-
erative.
Replace
bulb.
Replace
bulb.
Replace
switch.
5-49
