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 00-11 LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 4. B.O. STOPLIGHT LAMP DOES NOT LIGHT Test 1. Test for battery voltage at rear composite light. 1. Turn main light switch to OFF position. 2. Disconnect lead 23 at rear composite light on side of vehicle where B.O. stoplight is malfunctioning. 3. Turn main light switch to B.O. MARKER or B.O. DRIVE positions. 4. Depress brake pedal and check for battery voltage on contact end of lead 23. Test 2. Test continuity of filament in B.O. stoplight lamp. Check for continuity between lead 23 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 N. 1. If continuity is not present, replace B.O. taillight lamp (WP 0125 00). 2. If continuity is present, check for corroded contacts at lamp and on lead 23 connection to rear wiring harness. Reconnect lead 23. B.O. MARKER Table 2. Blackout Lights (B.O.) Troubleshooting Procedures (Contd). MAL 3 TEST 2 MAL 3 TEST 1 STEP 4