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Home >> Lincoln >> 1990 >> Mark VII LSC >> 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 "F" When Fuel Tank Is Full

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

  1. Disconnect instrument panel harness (14401) from rear lights harness (14405) connector, under instrument panel at fuse block. Using ohmmeter, measure resistance between Yellow/White wire of (14405) connector and instrument cluster ground. Reading should be less than 15 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 9-18 ohms. Measure resistance with arm at full stop. Reading should be 154-162 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.