TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
23. BACKUP ALARM DOES NOT OPERATE (MODEL B ONLY) (continued).
KNOWN INFO
4.
TEST OPTIONS
Engine switch on.
Continuity Tests.
Is there continuity
Light switch in service
measured between
REASON FOR QUESTION
drive or park position.
positions "1" and "2" at
Transmission shift lever in
the backup alarm
If there is no continuity
reverse position.
switch?
at the designated
Ground circuit OK.
position on the
Chassis wiring harness
transmission backup
OK.
alarm switch, the circuit
cannot be completed
POSSIBLE PROBLEMS
allowing the backup
Backup alarm switch at
alarm to sound audible
transmission faulty.
tone.
Backup alarm faulty.
Replace
transmission backup
alarm switch
(TM 9-2320-279-20).
YES
If all previous
tests were
completed with a
satifactory result,
replace backup
alarm
4-454.40
1
Change 1
