ENGINE FAILS TO CRANK WHEN STARTER IS ENGAGED WARNING (cont) -624880087

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ENGINE FAILS TO CRANK WHEN STARTER IS ENGAGED CONTINUED

WARNING

Although ignition lock switch must be on and battery ground cable connected to test electrical circuit

voltage, turn off ignition lock 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 16.

Using multimeter set to 30 vdc scale, place red probe on circuit breaker terminal (1) and black

probe on cowl support (2). Check for 11 to 13 vdc on multimeter.

a. If multimeter reads 11 to 13 vdc, go to step 17.

b. If multimeter reads less than 11 vdc, replace 40 ampere circuit breaker (page 2-516).

Step 17

Using multimeter set to 30 vdc scale, place red probe on ignition lock switch BATT terminal (3) and

black probe on box (4). Check for 11 to 13 vdc on multimeter.

a. If multimeter reads 11 to 13 vdc, go to step 18.

b. If multimeter reads less than 11 vdc, repair wire from ignition switch to circuit breaker (page 2-

137).

Step 18.

Using multimeter set to 30 vdc scale, place red probe on ignition lock switch IGN terminal (5) and

black probe on box (4). Turn ignition lock switch (6) clockwise to ignition. Check for 11 to 13 vdc on

multimeter.

a. If multimeter reads 11 to 13 vdc, go to step 19.

b. If multimeter reads less than 11 vdc, turn ignition lock switch counterclockwise to off. Replace

ignition lock switch and key (page 2-565).

Step 19.

Using multimeter set to 30 vdc scale, place red probe on starter neutral safety switch terminal (7)

and black probe on transmission case (8). Check for 11 to 13 vdc on multimeter.

a. If multimeter reads 11 to 13 vdc, go to step 20.

2-26