TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 HORN DOES NOT OPERATE 0037 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 Digital Multimeter (WP 0780 00, Item 43) General Mechanic’s Tool Kit (WP 0780 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/shutdown (see your -10) Carrier blocked (see your -10) Trim vane lowered (see your -10) Power plant front access door open (see your -10) T 1. Turn MASTER SWITCH to ON (see your -10). 2. Is MASTER POWER indicator on? TN 1. Go to Master Switch On Indicator Does Not Light (WP 0046 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? YN 1. Replace horn ground lead and/or connector (WP 0255 00). 2. Verify no faults found. 0037 00-1