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Fuel Gauge Sending Unit Test

CAUTION: Relieve fuel pressure before servicing fuel system. See BASIC DIAGNOSTIC PROCEDURES article in ENGINE PERFORMANCE.
  1. Remove fuel gauge sending unit. Connect ohmmeter between Green/Yellow wire or Black/Red wire, and Red wire of fuel gauge sending unit connector.
  2. Measure resistance with fuel gauge sending unit float in specified position. See FUEL GAUGE SENDING UNIT RESISTANCE  table. If resistance is not as specified, replace fuel gauge sending unit.
FUEL GAUGE SENDING UNIT RESISTANCE

Float Position (1) Ohms
Sending Unit No. 1 (Round Float)
Fully Raised 1.5
Fully Lowered 69.3
Sending Unit No. 2 (Angular Float)
Fully Raised 1.5
Fully Lowered 25.2
(1) Resistance values are approximate.