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Instrument Cluster Test 3F - Repairing Fuel Gauge

NOTE: Perform INSTRUMENT CLUSTER TEST 3A  before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION  For wiring diagrams, refer to WIRING DIAGRAMS  . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE  .
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Turn ignition off. Disconnect fuel pump module 4-pin connector, located behind back seat, in trunk. Ensure connector is clean and not damaged. Ensure fuel tank has some fuel in it. Turn ignition on with engine off. If fuel gauge does not display empty, go to next step. If fuel gauge displays empty, go to step 3).
  2. Turn ignition off. Disconnect Body Control Module (BCM) 20-pin connector located at junction block and ensure connector is clean and not damaged. See Figure in CHIME TEST 3A. Using external ohmmeter, measure resistance between ground and terminal No. 15 (Dark Blue wire) on BCM 20-pin connector. If resistance is less than 5 ohms, repair short to ground in Dark Blue wire. If resistance is 5 ohms or greater, replace BCM.
  3. Remove fuel level sending unit from fuel tank. Inspect tank unit for foreign material and sending unit for bent, sticking or binding arm. If tank and/or sending unit are okay, system is operating properly. If tank and/or sending unit are not okay, repair or replace as necessary.
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