TM 9-2320-273-20
Table 5-12. Backup Lamps Circuit Troubleshooting.
INSTRUCTION
INDICATION
YES
NO
REMARKS
1
BACKUP LAMP(S) INOPERATIVE.
1
Check for voltage at
12 volts dc nominal.
Check
Go to
inoperative lamp using
ground, re-
Step 2.
multimeter.
place bulb
(para 5-46).
2 Check for voltage at
12 volts dc nominal.
Go to
Check cir-
circuit 38B terminal
Step 3.
cuit 38B
of backup switch.
wiring.
3 Check for voltage at
12 volts dc nominal.
Replace
Check cir-
circuit 38A terminal
switch
cuit 38A
of backup switch.
(para 5-77).
wiring and
circuit
breaker.
5-55
