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 00-16 LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd) 0013 00-16 MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. DIRECTIONAL SIGNAL INOPERATIVE (Contd) Test 6. Test for voltage at rear composite light. 1. Disconnect lead 22-461 at left rear composite light 2. Turn main light switch to SERVICE DRIVE position. 3. Place turn signal switch in left position. 4. Set multimeter to a voltage range that will measure 24 VDC. 5. Touch multimeter negative lead to frame ground. 6. Touch multimeter positive lead to contact end of lead 22-461. Voltage should fluctuate at a rate of 1 or 2 cycles per second. Test 7. Test continuity of filament and socket for turn signal lamp. Check continuity between lead 22-460-461 attached to rear composite light and frame ground. Test 8. Test continuity of lead 22-461 from turn signal switch to rear harness connector. 1. Set multimeter to RX 1 scale. 2. Disconnect cable connector at turn signal switch. 3. Disconnect lead 22-461 from rear composite light. 4. Touch multimeter negative lead to contact end of lead 22-461. 5. Touch multimeter positive lead to contact end of lead 22-461 at turn signal cable connector (pin C). 1. If voltage does fluctuate, go to test 7. 2. If voltage does not fluctuate, go to test 8. 1. If continuity is present, reconnect lead 22-460-461 and check turn signal operation. 2. If continuity is not present, replace turn signal lamp (WP 0102 00). If continuity is not present, repair or replace lead 22-461 (WP 0090 00). Table 3. Directional Signal Systems Troubleshooting Procedures (Contd).