TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
47.
ENGINE WARNING BELL DOES NOT WORK.
WARNING
Although KEY SWITCH must be on and battery ground cable connected to test electrical circuit
voltage, turn off KEY SWITCH and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
equipment.
Step 1.Remove instrument panel pad (page 2-424). Using multimeter set to 20 vdc scale,
connect red test lead to input terminal (1) on engine warning bell (2) and black test lead to ground.
Rotate KEY SWITCH (3) clockwise to on position and check for 11 to 13 vdc on multimeter.
Rotate KEY SWITCH (3) counterclockwise to off position. Disconnect test leads.
a.
If multimeter reads 11 to 13 vdc, go to step 2.
b.
If multimeter does not read 11 to 13 vdc, go to step 3.
Step 2.Using multimeter set to 20 vdc scale, connect red test lead to output terminal (4) on engine
warning bell (2) and black test lead to ground. Rotate KEY SWITCH (3) clockwise to on position
and check for 11 to 13 vdc on multimeter. Rotate KEY SWITCH (3) counterclockwise to off
position. Disconnect test leads.
a.
If multimeter does not read 11 to 13 vdc, replace engine
warning bell (2) (page 2-
717).
b.
If multimeter reads 11 to 13 vdc, go to step 4.
Step 3.Using multimeter set to 20 vdc scale, connect red test lead to NC terminal (5) on engine oil
pressure switch (6) and black test lead to ground. Have assistant rotate KEY SWITCH (3)
clockwise to on position. Check for 11 to 13 vdc on multimeter. Have assistant rotate KEY
SWITCH (3) counterclockwise to off position. Disconnect test leads.
a.
If multimeter does not read 11 to 13 vdc, replace engine
oil pressure switch (6) (page
2-674).
b.
If multimeter reads 11 to 13 vdc, 19B wire (7) must be
replaced. Notify Direct
Support Maintenance.
2-294
