TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
Page 238 of 870
TM 9-2350-247-20-1 INFRARED HEADLIGHT(S) DOES NOT OPERATE—Continued 0037 00 6Y 1. Install circuit 520 plug on IR/BO select switch. 2. Replace light switch (WP 0262 00). 3. Verify no faults found. BY 1. Remove circuit 514 (high beam) plug (1) or 515 (low beam) plug (2) from failing infrared headlight (3). 2. Measure voltage between main harness circuit 514 plug (1) or 515 plug (2) and ground. 3. Does multimeter read less than 17 volts? YES NO BYN 1. Replace infrared headlights lamp unit (WP 0277 00). 2. Verify no faults found. 2BY 1. Repair main harness circuit 514 or 515 (WP 0294 00). 2. Verify no faults found. 0037 00-4