BATTERIES WILL NOT HOLD A CHARGE

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM

1. BATTERIES WILL NOT HOLD A CHARGE

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 1.

Check for defective batteries (TM 9-6140-200-14).

a. If both batteries are serviceable, go to step 2.

b. If either battery is defective, replace (page 2-692).

Step 2.

Check ac generator terminals (1, 2, 3, and 4), connectors (5, 6, and 7), voltage regulator leads (8, 9,

and 10), and ac generator output wires (11 and 12) for loose corroded, frayed, or broken

connections.

a. If terminals (1, 2, 3, and 4), connectors (5, 6, and 7), leads (8, 9, and 10), and wires (11 and 12)

are not loose, corroded, frayed, or broken, go to step 3.

b. If connections on terminals (1 or 2) are loose, tighten nuts (13 and 14) using 3/8-inch open-end

wrench.

c. If connections on terminal (3) are loose, tighten nut (15) using 7/16-inch open-end wrench.

d. If connectors (5 and 6) are loose or disconnected, push together until they lock.

e. If connector (7) is loose or disconnected from terminal (4), push on all the way.

f. If any connections are corroded, clean using wire brush.

g. If terminals (1, 2, 3, or 4) are broken, replace ac generator (page 2-436).

h. If leads (8, 9, or 10) are frayed or broken or if connector (4) is broken, replace voltage regulator

(page 2-452).

i. If wires (11 or 12) are frayed or broken, repair (page 2-137).

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