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Home >> Lincoln >> 1987 >> Mark VII Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Electronic >> Testing >> Instrument Cluster >> Fuel Gauge Does Not Display "E" When Fuel Tank Is Empty Or "F" When Fuel Tank Is Full

Fuel Gauge Does Not Display "E" When Fuel Tank Is Empty Or "F" When Fuel Tank Is Full

  1. Disconnect harness 14405/14401 connector, under instrument panel, at fuse block. Using ohmmeter, measure resistance between Yellow/White wire (Pin No. 7) and instrument cluster ground. Reading should be less than 20 ohms with tank empty and 143-161 ohms with tank full. If reading is okay, replace EIM. If not, go to next step.
  2. Lower fuel tank to access fuel gauge sending unit. Remove sending unit. Measure sending unit resistance with arm at empty stop. Reading should be 10-18 ohms. Measure resistance with arm at full stop. Reading should be 154-166 ohms. If readings are okay, inspect fuel tank for distortion and/or free movement of sender arm in tank. Service or replace as necessary. If readings are not okay, replace sending unit.