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Home >> Buick >> 1995 >> LeSabre Custom >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Testing >> Fuel Gauge Test >> Base Cluster

Base Cluster

  1. Turn ignition switch to OFF position. Disconnect fuel gauge sender connector. Connect 2 Red leads of Gauge Tester (J-33431) to fuel gauge sender connector terminals "B" (Purple wire) and "D" (Black wire). Turn ignition switch to RUN position.
  2. Set resistance dials on tester to zero ohms (Empty), then to 90 ohms (Full). If fuel gauge fluctuates from empty to full, check for poor connections at fuel gauge sender or for damage to pigtail wiring and repair as necessary. If connections and pigtail wiring are okay, replace fuel gauge sender.
  3. If fuel gauge does not fluctuate from empty to full, turn ignition off. Disconnect tester. Disconnect instrument cluster connector. Connect test light between cluster connector Purple wire terminal B3 and battery voltage. If test light lights, check Purple wire for a short to ground.
  4. If test light does not light, leave test light connected and connect jumper wire between fuel gauge sender connector terminal "B" (Purple wire) and ground. If test light does not light, check Purple wire for an open circuit.
  5. If test light lights, connect test light between fuel gauge sender connector terminal "D" (Black wire) and voltage. If test light lights, check Black wire for an open circuit. If test light does not light, check for good terminal contact at instrument cluster connector. If terminal contact is okay, replace instrument cluster.
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