TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. ENGINE CRANKS BUT FAILS TO START ABOVE 50°F (18°C) - 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.
CAUTION
Do not crank engine for more than 20 seconds. Allow starter motor to cool for 2 minutes between
cranking attempts. Cranking too long can overheat and damage starter motor.
Step 13. Check automatic override module (1) for 11 to 13 vdc at POS 1 terminal (2) as follows: Remove
instrument panel pad (page 2-424). Set multimeter to 20 vdc scale. Connect red test lead to
POS 1 terminal (2) and black test lead to ground. Have assistant rotate KEY SWITCH (3)
clockwise to on position and press ENGINE START button (4) for 1 second. Check for 11 to 13
vdc on multimeter. Have assistant rotate KEY SWITCH (3) counterclockwise to off position.
Disconnect test leads.
a
If multimeter reads no voltage, go to step 14.
b
If multimeter reads 11 to 13 vdc, go to step 17.
Step 14
Check for 11 to 13 vdc to fuse panel (5) as follows: Set multimeter to 20 vdc scale. Connect red
test lead to input terminal (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 reads no voltage, go to step 19.
b
If multimeter reads 11 to 13 vdc, go to step 15.
Step 15. Remove fuse (7) and check for broken conditions as follows: Set multimeter to ohms scale and
adjust to 0 ohms. Connect red test lead to fuse end (8) and black test lead to fuse end (9).
Check for 0 ohms on multimeter. Disconnect test leads.
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