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Fuel Gauge Sending Unit

  1. Place fuel gauge sending unit on test bench. Connect ohmmeter to fuel gauge sending unit terminals No. 1 and 2. SeeFig 1 . As float is moved, resistance reading should change smoothly. See FUEL GAUGE SENDING UNIT RESISTANCE  .
  2. Connect ohmmeter to fuel gauge sending unit terminals No. 1 and 4. Resistance should be infinite. If resistance readings are not as specified, replace sending unit.
Fig 1: Measuring Fuel Gauge Sending Unit Resistance
G93I01616Courtesy of ISUZU MOTOR CO.
FUEL GAUGE SENDING UNIT RESISTANCE

Sending Unit Position Ohms
Empty 115-125
1/2 43.5-46.5
Full 16.2-17.8
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