TM 5-3895-379-23-1
0025
TROUBLESHOOTING PROCEDURE
SYMPTOM
BACKUP ALARM DOES NOT WORK
MALFUNCTION
No Power To Backup Alarm Sending Unit.
CORRECTIVE ACTION
WARNING
Remove all jewelry such as rings, dog tags and bracelets. If jewelry contacts
electrical connection, a direct short may occur resulting in injury or death and
damage to equipment.
1.
Remove nine screws and washers and remove panel from operator station.
2.
Turn battery disconnect switch to ON position (TM 5-3895-379-10).
3.
Turn engine start switch to ON position (TM 5-3895-379-10).
4.
Set multimeter to measure VDC.
5.
Touch positive (+) probe of multimeter to terminal 1 (wire 121-YL).
Touch negative (-) probe of multimeter to good ground.
6.
7.
Turn engine start switch to OFF position (TM 5-3895-379-10).
8.
Connect a jumper wire across terminal 1 (wire 121-YL) and terminal 2 (wire 321-BR).
9.
Note if backup alarm sounds.
10.
Turn engine start switch to OFF position (TM 5-3895-379-10).
11.
Turn battery disconnect switch to OFF position (TM 5-3895-379-10).
12.
Remove jumper wire.
a.
If 24 to 28 VDC are not measured at terminal 1 and BACKUP ALARM fuse is good, repair
or replace wiring and connectors to BACKUP ALARM fuse holder (WP 0195).
b.
If backup alarm sounds, replace backup alarm sending unit (WP 0181).
0025-2
03/15/2011Rel(1.8)root(tswp)wpno(T00031)
