TM 9-2320-387-24-l
INSTRUMENTS CIRCUIT
DIAGNOSTIC FLOWCHART
1 TEST OPTlONS
I
KNOWN INFO
1. STE/lCE-R TESTS 89
(Page 2-906)
2. MULTIMETER
FUEL GAUGE DOESNIT
WORK
DISCONNECT WIRE 27J FROM
FUEL GAUGE. WITH THE ROTARY
SWITCH IN THE RUN POSITION,
DO YOU HAVE BAlTERY
VOLTAGE AT WIRE 27J?
REASON FOR QUESTlON
Thii wire provides power for the
gauge.
POSSIBLE
PROBLEMS
GAUGE
WIRING
SENDING UNIT
Eq
TEST OPTlONS
IS THERE CONTINUITY BETWEEN
1. STE/lCE-R TESTS 91
(Page 2-508)
WIRE 58H AT THE FUEL GAUGE
AND GROUND?
2. MULTlMETER
KNOWN INFO
POWER AVAILABLE TO
THE GAUGE
REASON FOR QUESTION
If there is continuity, then the
ground is OK
POSSIBLE
PROBLEMS
GAUGE
WIRING
SENDING UNlT
I
T OPTIONS
1. STE/lCE-R TESTS 91
(Page 2-508)
2. MULTiMETER
ES
KNOWN INFO
GAUGE GROUND OK
RECONNECT WIRE 27J &
DISCONNECT WIRE 28A AT THE
GAUGE. IS THE RESISTANCE
BETWEEN WIRE 28A AT FUEL
GAUGE AND CHASSIS GROUND
WITHIN 0 TO 35 OHMS?
REASON FOR QUESTION
If the resistance is OK the sense
line is OK
POSSIBLE
PROBLEMS
GAUGE
WIRING
SENDING UNIT
2-338
