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 TM 55-1905-223-24-18-1
f.
Set horn rotary switch to AUTO position (1, FIGURE 2-34).
Horn should automatically sound with the number of blasts, duration and
g.
silent intervals between blasts that corresponds to the code set in for
position 1.
Set rotary switch (1, FIGURE 2-34) to position 2 and compare horn response to
h.
that code set in for position 2.
Set rotary switch (1, FIGURE 2-34) to position 3 and compare horn response to
i.
that code set in for position 3.
While horn is operating in position 1, 2 or 3 of the AUTO mode, activate
j.
manual horn control. Manual selection should override automatic mode.
Set horn rotary switch to OFF (2, FIGURE 2-33).
k.
Horn operation should stop.
l.
Timer Enclosure.
m.
Open door of sequential timer enclosure and inspect panel assembly for
security of mounting, dents, bends, broken parts and security of electrical
connections.
If damage precludes normal operation, replace or repair as specified in
n.
paragraph 2-47 or 2-48.
o.
Inspect horn rotary switch for security of mounting, dents, bends, scratches
or abrasions, broken parts and ease of operation.
If damage precludes normal operation, replace rotary switch as specified in
p.
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