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 19.
Pull apart wire connectors (1 and 2) on neutral safety switch (3). Set multimeter to 20 vdc scale.
Connect red test lead to output terminal (4) and black test lead to ground. Have assistant rotate KEY
SWITCH (5) clockwise to on position and press ENGINE START button (6) for 5 seconds. Check for
11 to 13 vdc on multimeter. Have assistant rotate KEY SWITCH (5) counterclockwise to off position.
Disconnect test leads.
a.
If multimeter does not read 11 to 13 vdc, go to step 21.
b.
If multimeter reads 11 to 13 vdc, go to step 20.
Step 20.
Set multimeter to ohms scale and adjust to O ohms. Connect red test lead to wire connector (2) on
neutral safety switch (3) and black test lead to terminal (7) on primary magnetic switch (8). Check for
0 ohms on multimeter. Disconnect test leads.
a.
If multimeter reads no continuity, 14 wire (9) must be replaced.
Notify Direct Support Maintenance.
b.
If multimeter reads 0 ohms, go to step 21.
Step 21.
Pull apart wire connectors (10 and 11) on neutral safety switch (3). Set multimeter to 20 vdc scale.
Connect red test lead to input terminal (12) on neutral safety switch (3) and black test lead to ground.
Have assistant rotate KEY SWITCH (5) clockwise to on position and press ENGINE START button (6)
for 5 seconds. Check for 11 to 13 vdc on multimeter. Have assistant rotate KEY SWITCH (5)
counterclockwise to off position. Disconnect test leads.
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