ELECTRICAL SYSTEM - TM-9-2320-279-20-10228

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

2-15. TROUBLESHOOTING INSTRUCTIONS (CONT).

Table 2-9. Troubleshooting

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM

NOTE

Repair of electrical harnesses is limited to splicing new wires into the harness with

crimp connectors, taping the new wire to the harness, and replacing electrical

connectors. If two or more wires in a harness are found to be defective, notify the

supervisor for repair or replacement of harness. Wires that are not in a harness can

be replaced or repaired as required.

There are many different types of electrical connectors used to attach wires or cables

to electrical components on the vehicle. To install wires in crimp-type connectors,

refer to FM 55-506-l.

BATTERY WEAK OR FAILS TO MAINTAIN CHARGE.

Step 1.

Check that BATTERY gage reads 22 volts (min) with ENGINE switch ON.

If not, service batteries (TM 9-6140-200-14).

Step 2.

Check for loose, damaged or missing alternator belts.

Adjust loose belts (para 6-14) or replace damaged or missing belts (para 6-15).

Step 3.

Check battery cables and alternator wiring for continuity.

Repair broken wires and connectors.

Step 3.1

Check that wire No. 831 at regulator has 22 volts (min) with ENGINE switch ON.

If not, perform step 3.2.

Step 3.2

Remove circuit breaker compartment cover (para 7-43). Check circuit breaker No. 9 for

Replace defective circuit breaker No. 9 (para 7-43).

Step 4.

Perform alternator test (para 7-2).

If voltage is low, adjust regulator (para 7-6), then replace regulator or alternator

(para 7-5 or 7-3) as necessary.

Change 3