Table 4. Lighting System Troubleshooting Procedures - Continued.

TM 10-3930-660-24-1

TROUBLESHOOTING PROCEDURES - CONTINUED

0006 00

Table 4. Lighting System Troubleshooting Procedures - Continued.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Check if circuit breaker (CB

Check backup alarm circuit for

Backup Alarm Does Not Sound.

2) is tripped.

shorts, broken wire, or bad

ground. Refer to Electrical

Schematic (WP 0326 00).

a. The circuit breakers will

trip if there is a shorted or

grounded wire.

b. The circuit breaker will

automatically reset after

cooling. They cannot be

reset manually.

c. Under normal operating

conditions, circuit

breakers should never

require replacement.

However, if a circuit

breaker does not reset

after it has cooled, the

circuit breaker is

defective and must be

replaced (WP 0071 00).

2. Check for defective backup

Check switch and switch wires

alarm switch, broken switch

for continuity (WP 0109 00).

wires, or loose connections.

3. Check for defective backup

Test backup alarm. Replace if

alarm.

defective (WP 0103 00).

4. Check for defective blackout

Replace switch if defective (WP

light switch.

0094 00).

5. Check for bad or weak cell in

Test battery using hydrometer

battery.

(TM 9-6140-200-14).

0006 00-9