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Home >> Mazda >> 1990 >> 929 Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Electronic >> Testing Fuel Gauge Sending Unit >> Resistance Tests

Resistance Tests

Remove fuel gauge sending unit and disconnect sending unit connector. Connect an ohmmeter between connector terminals. Move float to various positions indicated and check resistance readings against SENDING UNIT RESISTANCE SPECIFICATIONS table. If resistance is not as specified, replace fuel gauge sending unit.

SENDING UNIT RESISTANCE SPECIFICATIONS

Float Position Resistance Range
Fully Raised 1-5 ohms
Three-Quarters 28-36 ohms
One-Quarter 45-57 ohms
Fully Lowered 103-117 ohms