TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
ENGINE FAILS TO CRANK - CONTINUED.
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 23.
Set multimeter to ohms scale and adjust to 0 ohms. Connect red test lead to output terminal (1) on
ENGINE START button (2) and black test lead to input terminal (3) on neutral safety switch (4).
Check for 0 ohms on multimeter. Disconnect test leads.
a.
If multimeter reads no continuity, 17C wire (5) must be replaced.
Notify Direct Support Maintenance.
b.
If multimeter reads 0 ohms, push wire connectors (6 and 7) together and go to step
24.
Step 24.
Set multimeter to 20 vdc scale. Connect red test lead to input terminal (8) on ENGINE START button
(2) and black test lead to ground. Have assistant rotate KEY SWITCH (9) clockwise to on position.
Check for 11 to 13 vdc on multimeter. Have assistant rotate KEY SWITCH (9) counterclockwise to off
position. Disconnect test leads.
a.
If multimeter does not read 11 to 13 vdc, go to step 25.
b.
If multimeter reads 11 to 13 vdc, replace ENGINE START button (2) (page 2-738).
Step 25
Set multimeter to 20 vdc scale. Connect red test lead to output terminal (10) on KEY SWITCH (9) and
black test lead to ground. Rotate KEY SWITCH (9) clockwise to on position. Check for 11 to 13 vdc
on multimeter. Rotate KEY SWITCH (9) counterclockwise to off position. Disconnect test leads.
a.
If multimeter does not read 11 to 13 vdc, go to step 27.
b.
If multimeter reads 11 to 13 vdc, go to step 26.
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