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Home >> Ford >> 1994 >> Crown Victoria Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Electronic >> Testing >> Pinpoint Test BC - Inaccurate Fuel Indication - Full Not Indicated When Tank Is Full Or Empty Not Indicated When Tank Is Empty

Pinpoint Test BC - Inaccurate Fuel Indication - Full Not Indicated When Tank Is Full Or Empty Not Indicated When Tank Is Empty

  1. Disconnect negative battery cable. Lower fuel tank to gain access to fuel tank sending unit. Unplug connector at fuel tank sending unit.
  2. Connect a 43-ohm resistor between terminals of fuel tank sending unit harness connector. Reconnect negative battery cable. Turn ignition on. Observe fuel gauge. Fuel gauge should display 3 or 4 bars. Fuel remaining should indicate 3-4 gallons.
  3. If readings are not as specified, turn ignition off. Leave resistor connected and go to next step. If all readings are okay, turn ignition off. Remove resistor. Go to step 6).
  4. Disconnect negative battery cable. Remove instrument cluster. See ELECTRONIC INSTRUMENT CLUSTER (EIC)  under REMOVAL & INSTALLATION. Measure resistance between EIC harness connector C2-1 pin No. 2 (Yellow/White wire) and connector C2-1 pin No. 4 (Black/Light Blue wire). See 6.
  5. If resistance is 42-45 ohms, replace instrument cluster. If resistance is not 42-45 ohms, repair wiring between instrument cluster and fuel tank sending unit.
  6. Disconnect negative battery cable. Inspect fuel tank sending unit for binding, sticking, or misalignment. If fuel tank sending unit is damaged, replace sending unit. If fuel tank sending unit is okay, go to next step.
  7. Inspect fuel tank for dents, improper installation of filler tube, or other causes of improper sending unit operation. If components are defective, replace as necessary. If components are okay, fault is caused by another system on vehicle.
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