ENGINE FAILS TO CRANK WHEN STARTER IS ENGAGED WARNING (cont) -624880083

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.

Do not smoke, use open flame, or allow sparks near batteries. The mixture of oxygen and

hydrogen gases released from batteries is highly flammable and can explode causing

serious injury or death.

Step 9.

Using multimeter set to 30 vdc scale, place red probe on positive ( + ) battery terminal (1) and black

probe on negative (-) battery terminal (2). Check for 11 to 13 vdc on multimeter.

a. If multimeter reads 11 to 13 vdc, go to step 10.

b. If multimeter reads less than 11 vdc, replace defective batteries (page 2-692).

Step 10.

Using 1/2-inch open-end wrench and 1/2-inch box wrench, loosen nut (3). Take terminal clamp (4)

off of negative (-) battery terminal (2). Using multimeter set to RXI scale, place red probe on

terminal clamp (4) and black probe on terminal (5). Check for 0 ohm on multimeter.

a. If multimeter reads 0 ohm, place terminal clamp (4) onto negative (-) battery terminal (2) and

tighten nut (3). Using 112-inch openend wrench and 1/2-inch box wrench. Go to step 11.

b. If multimeter reads more than 0 ohm, replace battery ground cable (2-696).

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