TM 5-3805-292-23
0006
ELECTRICAL TROUBLESHOOTING - BACKUP ALARM INOPERATIVE
0006
Check 10A backup alarm/horn
Fuse okay?
Replace fuse (TM 5-3805-292-10).
NO
fuse (TM 5-3805-292-10).
YES
Disconnect backup alarm pressure
switches (WP 0140).
Press power button to turn power on to
machine (TM 5-3805-292-10).
12V
Perform Open Harness Test for
NO
Measure voltage between backup alarm
present?
circuit 890 (WP 0173).
switch connector 42 circuit 890B (O),
20. Back Up Alarm).
YES
Check for continuity between
backup alarm switch connector 43
circuit 895A (O), harness side and
Continuity
Repair circuit 895A or replace
backup alarm switch connector 44
NO
present?
chassis wiring harness (WP 0146).
circuit 895A (O), harness side
Alarm).
YES
Jack up machine until tracks are
off ground and support with
jackstands.
Start machine (TM 5-3805-292-
Continuity present
10).
with joystick
Replace backup alarm pressure
While holding ground drive
pressed? Continuity
NO
switch (WP 0140).
joystick in reverse, check for
NOT present with
continuity between backup alarm
joystick released?
switch connector 42 switch side
and 43 switch side (WP 0175,
Frame 20. Back Up Alarm).
YES
While holding ground drive
Continuity present
joystick in reverse, check for
with joystick
continuity between backup alarm
Replace backup alarm pressure
pressed? Continuity
NO
switch connector 44 switch side
switch (WP 0140).
NOT present with
and 45 switch side (WP 0175,
joystick released?
Frame 20. Back Up Alarm).
YES
Q
CONTINUED