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TM 9-2320-360-20-1
ENGINE SWITCH FEED TEST
(1)
Turn ENGINE switch to OFF.
(2)
Place positive (+) probe of multimeter on
BAT terminal (wire no. 1431) at ENGINE
switch.
(3)
Place negative (-) probe of multimeter on
ground and look for 22-28 volts on
multimeter.
(4)
Check for voltage at the following points If
no voltage is measured at BAT terminal
(wire no 1431) of ENGINE switch.
(a) Check wire no. 1431 at 150 amp, 24 V
circuit breaker. If no voltage is
measured, circuit breaker is faulty.
(b) Check wire no. 1274 at 150 amp, 24 V
circuit breaker. If no voltage Is
measured, circuit breaker is faulty.
(c)
Check wire no. 1274 at starter motor.
If no voltage is measured, there is an
open in wire no. 1274.
ENGINE SWITCH TEST
NOTE
ENGINE switch must be
positioned
to
ON
to
perform this test
(1)
Turn ENGINE switch to ON.
(2)
Place positive (+) probe of multimeter
on wire no 1872 at IGN terminal of
ENGINE switch.
(3)
Place negative (-) probe of
multimeter on ground and look for
22-28 volts on multimeter.
(4)
Turn ENGINE switch to OFF.
ENGINE SWITCH TEST
NOTE
ENGINE switch must be
positioned and held to
START to perform this test.
(1)
Turn and hold ENGINE switch to
START.
(2)
Place positive (+) probe of multimeter
on wire no. 1021 at ST terminal of
ENGINE switch.
(3)
Place negative (-) probe of
multimeter on ground and look for
22-28 volts on multimeter.
(4)
Turn ENGINE switch to OFF.
Change 2 2-373
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