TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
23. BACKUP ALARM DOES NOT OPERATE (MODEL B ONLY)
INITIAL SETUP
Tools and Special Tools
Equipment Condition
Tool Kit, General Mechanic's: Automotive
Engine turned off (TM 9-2320-279-10)
(SC 5180-90-N26)
Parking brake applied (TM 9-2320-279-10)
Wheels chocked (TM 9-2320-279-10)
START
1.
TEST OPTIONS
KNOWN INFO
Is the engine switch
None.
Operational Test.
"ON", light switch in
SERVICE position and
POSSIBLE PROBLEMS
REASON FOR QUESTION
transmission shift lever
Engine switch not on.
in "REVERSE" posi-
Without the engine switch,
Light switch not in service
tion"?
light swith, and transmis-
drive or park position.
sion shift lever in the
Transmission shift lever
proper position the backup
not in reverse position.
alarm does not operate.
Ground circuit faulty.
Chassis wiring harness
faulty.
Backup alarm switch at
transmission faulty.
Backup alarm faulty.
Place switches in
the proper position
NO
for test (TM 9-2320-
279-10-1).
YES
4-444.34
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