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 00-10 LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. B.O. TAILLIGHT LAMP DOES NOT LIGHT Test 1. Test battery voltage at rear composite light. 1. Turn main light switch to OFF position. 2. Disconnect lead 24 at rear composite light on side of vehicle where B.O. light has failed. 3. Turn main light switch to B.O. MARKER or B.O. DRIVE positions. 4. Check for battery voltage at contact end of lead 24. Test 2. Test continuity of filament in B.O. taillight lamp. Check continuity between lead 24 attached to rear composite light and frame ground. 1. If battery voltage is present, go to test 2. 2. If battery voltage is not present, go to WP 0013 00, table 1, malfunction 1, test 3, and check front wiring harness, pin E. 1. If continuity is not present, replace B.O. light lamp (WP 0125 00). 2. If continuity is present, check for corroded contacts at lamp and on lead 24 connection to rear wiring harness. Reconnect lead 24. Table 2. Blackout Lights (B.O.) Troubleshooting Procedures (Contd). MAL 3 TEST 2 MAL 3 TEST 1 STEP 4 24 24 B.O. MARKER B.O. MARKER