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 00-6 LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. TAILLIGHT OR CLEARANCE LAMP DOES NOT LIGHT Test 1. Test battery voltage at rear composite light. 1. Place main light switch lever in OFF position. 2. Disconnect lead 21 from rear composite light 3. Turn main light switch lever to SERVICE DRIVE position. 4. Check for battery voltage on contact end of lead 21. Test 2. Test continuity of filament in taillight lamp. Set multimeter to RX 1 scale. Check for continuity between lead 21 connected to rear composite light and frame ground. 1. If battery voltage is present, go to test 2 and check lamp filaments (WP 0125 00). 2. If voltage is not present, go to WP 0013 00, table 1, malfunction 1, test 3, and check front wiring harness pin H. 1. If continuity is not present, replace taillight lamp (WP 0125 00). 2. If continuity is present, check for corroded contacts at lamp and lead 21 connection to rear wiring harness. Reconnect lead 21. 4. STOPLIGHT LAMP DOES NOT LIGHT Test 1. Test battery voltage at rear composite light. 1. Turn main light switch to OFF position. 2. Disconnect lead 22-460-461 from rear composite light on side of vehicle where stoplight has failed. NOTE Ensure turn indicator is in neutral position. 3. Check for battery voltage on contact end of lead 22-460-461. Test 2. Test continuity of filament in stoplight lamp. Check continuity between frame grounds and lead 22-460-461 connected to rear composite light. 1. Depress brake pedal to activate stoplight switch. 2. If voltage is present, go to step 2. 3. If battery voltage is not present, go to WP 0013 00, table 1, malfunction 1, test 3, and test lighting system harness connector pin C. If continuity is present, check for corroded contact at lamp and lead 22-460-461 connection to rear wiring harness. Reconnect lead 22-460-461. Table 1. Lighting System Troubleshooting Procedures (Contd).