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Home >> Ford >> 1988 >> Taurus MT5 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Standard >> Testing >> Fuel Indicating System - Fuel Sender Unit >> Bench Test

Bench Test

  1. Connect one lead of a Rotunda Digital Volt Ohm Meter 007-00001, AC/DC Ohmmeter or equivalent to the ground terminal of fuel sender connector, and the other lead to the variable resistor terminal. When float rod is against EMPTY stop (closet to the fuel filter), the sender resistance reading should be 14-18 ohms. If EMPTY fuel tank sender resistance reading is below 14 ohms or above 18 ohms the fuel sender unit must be replaced.
  2. Observing ohmmeter reading while slowly moving float between EMPTY and FULL float rod stops. The resistance increase or decrease should be smooth without jumping or hesitation. The ohmmeter should read between 14 and 165 ohms. If resistance reading jumps or hesitates while slowly moving float rod, the fuel sender must be replaced.
  3. Move float rod to FULL STOP position (furthest away from fuel filter). The ohmmeter should read between 155 and 165 ohms. If ohmmeter reading is below 155 ohms or above 165 ohms resistance, fuel sender must be replaced.
  4. Before installing fuel sender unit, wire harness connector should be connected to the fuel sender unit and float rod moved from EMPTY to FULL stops check fuel gauge readings.
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