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TM-9-2320-361-24-1 Page 255

TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

Page 255 of 1176


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TM 9-2320-361-24-1 0014 00 0014 00-19/20 blank INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 10. HORN DOES NOT OPERATE (Contd) Test 4. Test horn switch continuity. 1. Disconnect lead 25 from air horn solenoid to protect multimeter. 2. Reinstall horn button cap, spring, and contact (WP 0113 00). 3. Set multimeter to RX 1 scale. 4. Connect negative lead to a good frame ground. 5. Touch positive lead to lead 25 and press down until contact touches base plate. 1. If continuity is present, reconnect lead 25 and recheck horn operation. 2. If continuity is not present, remove horn button and clean or replace horn button (WP 0113 00). Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd). TEST 2 STEP 4 TEST 2 STEP 3 HORN SOLENOID PIN A PIN B 25 25 TEST 4 STEP 5 TEST 3 STEP 4 TEST 1 STEP 5 25 LEAD 25 END OF WORK PACKAGE