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Home >> Dodge and Ram >> 1993 >> Caravan Base, 3.0 3 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Connector Identification >> Test 45A - Repairing Fuel Level Sending Unit
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Test 45A - Repairing Fuel Level Sending Unit

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Perform TEST VER - 1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Using DRB-II, read fuel level sensor status. Disconnect fuel pump/sending unit connector. Connector is located underneath vehicle along frame rail. Check connector, and clean or repair connector as necessary. Using DRB-II, read fuel level sensor voltage.
  2. If voltage is more than 8 volts, go to step 5). If voltage is less than 8 volts, turn ignition switch to OFF position. Disconnect Blue body controller connector. Check connector, and clean or repair connector as necessary.
  3. Turn ignition switch to ON position. With DRB-II in voltmeter mode, check voltage of fused ignition feed circuit at Blue body controller connector terminal No. 12 (Dark Blue/White wire). If voltage is less than 10 volts, repair open in Dark Blue/White wire. If voltage is more than 10 volts, turn ignition switch to OFF position.
  4. Using DRB-II in ohmmeter mode, check resistance of fuel sense signal circuit at Blue body controller connector terminal No. 11 (Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue wire. If resistance is more than 5 ohms, replace body controller.
  5. Connect a jumper wire between fuel level sense circuit (Dark Blue wire) and system ground circuit (Black wire) at fuel pump/sending unit connector. Using DRB-II, read fuel level status. If DRB-II displays 0.0 VOLTS, replace fuel level sensor.
  6. If DRB-II does not display 0.0 VOLTS, disconnect jumper wire. Connect a jumper wire between fuel level sense circuit (Dark Blue wire) at fuel pump/sending unit connector and ground. If DRB-II displays 0.0 VOLTS, repair open in Black wire. If DRB-II does not display 0.0 VOLTS, disconnect jumper wire. Gain access to body controller.
  7. Body controller is located under left side of instrument panel. Connect a jumper wire between fuel level sense circuit at Blue body controller connector terminal No. 11 (Dark Blue wire) and ground. If DRB-II displays 0.0 VOLTS, repair open in Dark Blue wire. If DRB-II does not display 0.0 VOLTS, replace body controller.
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