TM 9-2350-247-20-1
HORN DOES NOT OPERATE
0044 00
INITIAL SETUP:
Maintenance Level
Unit
Tools and Special Tools
General Mechanics Tool Kit (WP 0541 00, Item 57)
Multimeter (WP 0541 00, Item 29)
Jumper Wire
Personnel Required
Unit Mechanic
Helper (H)
References
See your -10
Equipment Condition
Engine stopped (see your -10)
Carrier blocked (see your -10)
NOTE
M548A1 and M548A3 troubleshooting procedures are the same. M548A1 procedure i s 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