TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 HORN DOES NOT OPERATE 0044 00 INITIAL SETUP: M a i n t e n a n c e L e v e l Unit T o o l s a n d S p e c i a l T o o l s General Mechanic’s Tool Kit (WP 0541 00, Item 57) Multimeter (WP 0541 00, Item 29) Jumper Wire P e r s o n n e l R e q u i r e d Unit Mechanic Helper (H) R e f e r e n c e s See your -10 E q u i p m e n t C o n d i t i o n Engine stopped (see your -10) Carrier blocked (see your -10) NOTE M548A1 and M548A3 troubleshooting procedures are the same. M548A1 procedure is shown. T 1. Turn MASTER SWITCH ON. 2. Is MASTER POWER indicator on? YES NO TN 1. Go to MASTER SWITCH ON indicator does not light (WP 0049 00). Y 1. Remove horn ground lead plug (1) from horn jack (2). 2. Measure continuity between horn ground lead plug (1) and ground. 3. Does multimeter read 0 ohms? YES NO YN 1. Replace horn ground lead and/or connector (WP 0289 00). 2. Verify no faults found. 0044 00-1