TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

TM 9-2320-361-24-1 0013 00 0013 00-1 FIELD TROUBLESHOOTING 2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL) LIGHTING AND WIPER SYSTEM TROUBLESHOOTING MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. HEADLIGHT DOES NOT OPERATE ON LOW OR HIGH BEAM, OR BOTH HEADLIGHTS INOPERATIVE Test 1. Test headlamp connection voltage. 1. Check for loose connection at headlamp and wiring harness and for broken headlamp. 2. Ensure body ground straps are secure and clean. 1. Remove corrosion or dirt buildup from ground lead connection. 2. Tighten screws connecting ground strap to frame. HI BEAM INDICATOR R.H. FRONT COMPOSITE LIGHT PARK TURN B.O. MARKER L.H. FRONT COMPOSITE LIGHT PARK TURN B.O. MARKER L.H. HEADLAMP HI BEAM 17 LOW BEAM 18 91 R.H. HEADLAMP HI BEAM 17 LOW BEAM 18 91 18 17 22 15 40 460 R.H. TURN 461 L.H. TURN 22/460 22/461 21 489 24 467A 467B 461/460 L.H. REAR COMPOSITE LIGHT TAILLIGHT STOP/TURN B.O. TAILLIGHT B.O. STOPLIGHT R.H. REAR COMPOSITE LIGHT TAILLIGHT STOP/TURN B.O. TAILLIGHT B.O. STOPLIGHT TURN SIGNAL CONTROL A B C FLASHER POWER ACCESSORY SWITCH 491 PARK 21 TAILLIGHT PANEL LIGHTS E G B D C +24 VDC C 11 A F B L H M T A K C PANEL BRT PANEL DIM OFF PARK SERVICE DRIVE STOP LIGHT OFF 75 STOPLIGHT 75 STOPLIGHT 16 HEADLIGHTS D E C H F G B A VAN BODY B.O. CLEARANCE VAN BODY CLEARANCE H L Table 1. Lighting System Troubleshooting Procedures. HORN CIRCUIT BREAKER DIMMER SWITCH 491 460-461 20-483- 484 491 460-461 20-483- 484 21 22-460-461 24 23 21 22-460-461 24 23