TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0013 00 0013 00-2 LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. HEADLIGHT DOES NOT OPERATE ON LOW OR HIGH BEAM, OR BOTH HEADLIGHTS INOPERATIVE (Contd) 3. Turn main light switch to OFF position. 4. Disconnect leads 17 (high beam), 18 (low beam), and 91 (ground) behind headlamp. 5. Place main light switch lever in SERVICE DRIVE position. 6. Check low beam and high beam voltage. Push dimmer switch to LOW position. Check for battery voltage between lead 18 and lead 91. 7. Push dimmer switch to HIGH position. Check for battery voltage between lead 17 and lead 91. 8. Check continuity of low beam filament. Place multimeter leads between headlamp connectors 18 and 91 at rear of lamp. 9. Check continuity of high beam filament. Place multimeter leads between headlamp connectors 17 and 91 at rear of headlamp. If voltage is present, go to step 7. If voltage is not present, go to test 2. If voltage is present, go to step 8. If continuity is not present, replace sealed beam headlamp (WP 0120 00). If continuity is not present, replace sealed beam headlamp (WP 0120 00). MAL 1 TEST 1 STEP 8 MAL 1 TEST 1 STEP 9 17 91 18 MAL 1 TEST 1 STEP 6 17 91 18 Table 1. Lighting System Troubleshooting Procedures (Contd).