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Fuel Gauge: Navajo

  1. Ensure fuse and wiring are okay. To test fuel gauge, remove fuel tank and disconnect fuel gauge sending unit connector.
  2. Connect Red wire lead of Checker (49-0839-285) to Yellow/White wire of sending unit connector (harness side). Connect Black wire lead of checker to body ground.
  3. Set checker to 22-ohm position. Turn ignition on. Allow 2 minutes for needle to stabilize. If gauge indicates "E", go to step 5). If gauge indicates inaccurately, turn ignition off. Remove instrument cluster.
  4. Remove slosh module located on back of instrument cluster. Connect a jumper wire from Red lead of checker to fuel gauge terminal "S" (Yellow/White wire). Turn ignition on. If gauge does not indicate "E", replace gauge. If gauge indicates "E", replace slosh module.
  5. Turn ignition off. Set checker to 145-ohm position. Turn ignition switch to ON position. Allow 2 minutes for needle to stabilize. If gauge indicates "F", check sender circuit wiring for shorts or opens using an ohmmeter. If gauge indicates inaccurately, remove instrument cluster.
  6. Inspect printed circuit to ensure loop connecting fuel sender input to fuel gauge is cut. If loop is not cut, correctly cut printed circuit at loop. Remove slosh module from rear of instrument cluster, and connect jumper wire from Red lead of checker to gauge terminal "S" (Yellow/White wire).
  7. Reconnect cluster connector, and recheck gauge. If gauge does not read "F", replace gauge. If gauge reads "F", replace slosh module.
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