TM 5-3805-280-24-1
Sub-System Diagnostics
HIGH NOTE HORN (B25)
Disconnect wire harness from horns.
YES: Check wire
AND LOW NOTE HORN
harness.
(B26) CHECK
Connect 24 volts to one terminal of either horn and
connect other horn terminal to ground.
NO: Replace horn.
Does horn sound?
Repeat check on other horn.
T7469AF UN11MAR91
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QUICK HITCH CIRCUIT OPERATIONAL
INFORMATION
9015
15
41
In order for the circuit to function, the key switch must be
in the ACC or ON position.
CED,OUOE012,131 1915MAR991/1
QUICK HITCH CIRCUIT THEORY OF
OPERATION
With the key switch in the ON or ACC position, power is
applied from auxiliary fuse F19 to quick hitch fuse F24 via
terminal 2 of auxiliary terminal strip X27. When quick hitch
switch S21 is moved to the UNLATCH (closed) position,
power from fuse F24 is applied through the switch to
solenoid Y2, energizing the solenoid. With the switch in
the UNLATCH position, power is also applied from to
warning light H23 and audible alarm H22.
CED,OUOE012,132 1915MAR991/1
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