TM 9-2320-387-24-l
INSTRUMENTS CIRCUIT,
H&s9
TEST
opT,olAGNOSTIC
FLOWCHART
I
I
KNOWN INFO
I
POWER AVAILABLE TO
THE GAUGES
OIL PRESSURE
GAUGE
DOESNT
WORK
WIRING
OIL PRESSURE
GAUGE
HAS POWER
POSSIBLE
PROBLEMS
SENDING UNIT
KNOWN INFO
GAUGE GROUND OK
POSSIBLE
PROBLEMS
OIL PRESSURE
GAUGE
SENDING UNIT
WIRING
DISCONNECT WIRE 27H AT THE
OIL PRESSURE GAUGE. WITH THE
ROTARY SWITCH IN THE RUN
POSITION, DO YOU HAVE
BATTERY VOLTAGE AT WIRE 27H?
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I
1
1. STE/ICE-R TEST 89
(Page 2-506)
2. MULl-lMETER
REASON FOR QUESTION
This is the cower wire for
the gauge.
t H2
I TES
WITH THE ROTARY SWITCH IN
THE OFF POSITION, DO YOU
HAVE CONTINUITY BETWEEN
WIRE 58G AT THE GAUGE AND
ENGINE (OR BODY) GROUND?
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r OPTIONS
1. ST&ICE-R
TEST 91
(PAGE 2-508)
2. MULTIMETER
REASON FOR QUESTION
This is the ground wire for
the gauge.
r
TEST OPTIONS
1. STE/lCE-R TEST 91
DISCONNECT WIRE 36A AT THE
GAUGE AND AT THE OIL
(Page 2-508)
PRESSURE SENDING UNIT. DO
2. MULTIMETER
YOU HAVE CONTINUITY
THROUGH WIRE 36A?
RECONNECT WIRE 36A AFTER
MAKING THE MEASUREMENT.
REASON FOR QUESTION
If this wire is open, the gauge
will always read offscale to the
2-342
