EXTENDABLE FLOOD LIGHTS DO NOT OPERATE.

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TM-9-2320-279-10-3 M977 Series 8x8 Heavy Expanded Mobility Tactical Trucks (HEMTT) Manual

FOAM SYSTEM DOES NOT OPERATE.

TM 9-2320-279-10-3

Troubleshooting Index (Cont)

3-16. TROUBLESHOOTING MALFUNCTIONS (CONT).

Table 3-5.

Troubleshooting

Malfunction

Test or Inspection

Corrective Action

9. EXTENDABLE FLOOD LIGHTS DO NOT OPERATE.

Step 1.

Check if any other 120 VAC circuits operate.

If all 120 VAC circuits do not operate, troubleshoot 120 VAC

generator output voltage (malfunction 12).

EXTENDABLE

CIRCUIT

WORK LIGHT

BREAKER 5

ASSEMBLY

SWITCH

tfft00413

CIRCUIT

PASS FLOOD

BREAKER 6

SWITCH

DRIVER FLOOD

SWITCH

NOTE

Circuit breaker may be in ON position when tripped. To make

sure circuit breaker is not tripped, reset circuit breaker by

switching it to the OFF position then back to ON position.

Step 2. Check if circuit breaker 5 or 6 is tripped.

If circuit breaker 5 or 6 is tripped, reset tripped circuit

breaker. If circuit breaker trips again, notify Supervisor.

Step 3. If driver side extendable flood light does not operate: Check if

DRIVER FLOOD switch in cab is in the ON position.

If DRIVER FLOOD switch is not in the ON position,

place switch to the ON position.