TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-20-1 BLACKOUT DRIVE LIGHT DOESN’T WORK—Continued 0030 00 5Y 1. Measure resistance between harness 12349881 circuit 520 plug (1) and lighting control switch plug (2) pin D (3). 2. Does multimeter read 0 ohms? YES NO 5YN 1. Install harness 12349881 circuit 19 plug on IR/BO selector switch jack. 2. Install harness 12349881 plug on light control switch jack. 3. Repair circuit 520 (WP 0382 00). 4. Verify no faults found. 6Y 1. Install harness 12349881 circuit 520 plug on IR/BO selector switch jack. 2. Install harness 12349881 plug on light control switch jack. 3. Repair circuit 19. 4. Verify no faults found. YES 0030 00-3/4 blank