TM 9-2330-238-14
Table 4-2. Organizational Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Check for defective ballast.
Replace defective ballast (para 4-31).
Step 4.
Check for defective light fixture.
Replace defective light fixture (para 4-31).
8.
NO INTERIOR LAMPS WILL LIGHT EXCEPT BLACKOUT LAMP
Step 1.
Check to see if blackout light circuit switch is in ON position and door is open.
Close door and place blackout light circuit switch in OFF position.
Step 2.
Check for defective blackout light circuit switch or door switch.
Replace defective switch (para 4-15 or 4-22).
Step 3.
Check for defective electromagnetic relay.
Replace defective electromagnetic relay (para 4-24).
9.
LIGHTS DO NOT GO OUT WHEN SIDE DOOR IS OPENED UNDER BLACKOUT CONDITIONS (M313).
Step 1.
Check for short circuit in cable to hinged roof electrical contact.
Remove hinged roof electrical contact (para 4-20). Wrap metal housing and wires leading to
terminals with electrical tape (Item 17, Appendix E). Install hinged roof electrical contact.
Step 2.
Check for short circuit at contact plate on solid side wall.
Remove contact plate and wrap exposed parts of cable with electrical tape (Item 17,
Appendix E). Install contact plate,
10. LIGHTS DO NOT GO ON WHEN SIDE DOOR IS CLOSED UNDER BLACKOUT CONDITIONS (M31 3).
Step 1.
Check to see if hinged roof electrical contact is making contact with plate.
Screw turnbuckle eyebolt inward to shorten wire rope assembly (para 4-60). If malfunction
persists, aline hinged roof electrical contact with surface of contact plate.
Step 2.
Check for loose connections.
Remove hinged roof electrical contact and plates (para 4-20). Repair connections at
terminals.
11. NO POWER TO DUPLEX RECEPTACLES (ALL MODELS EXCEPT M749).
Step 1.
Check to see if receptacle blackout switch is in ON position or main blackout switch is in ON posi-
tion and door is open.
Place receptacle blackout switch to OFF position, or main blackout switch to OFF, or close
door.
4-11
