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![]() TM 9-2320-303-24-1 
Table 1. Blackout Light Circuits Troubleshooting Procedures. 
MALFUNCTION 
TEST OR INSPECTION 
CORRECTIVE ACTION 
1. 
None Of The Blackout (B/O) Lights Operate. Check B/O 15A fuse. 
If defective, replace 15A fuse (WP 
2. 
None Of The Blackout (B/o) Stoplights 1. Inspect light bulbs. 
Operate. 
2. Disconnect  B/O  stoplights If +24 VDC is present, go to step 
relay from connector. Check 3. If no voltage is present, repair 
for +24 VDC at connector 30. lead connector 421V. 
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