Fuel Level Sending Unit Failure
- Turn ignition off. Remove rear seat and disconnect left body harness connector C308. Turn ignition on. Measure voltage at terminal No. 3 (Dark Blue wire) at left body harness connector C308. See Fig 1
. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 6
.
- Connect a test light between ground and terminal No. 3 (Dark Blue wire) at left body harness connector C308. If test light illuminates, go to next step. If test light does not illuminate, go to step 4
.
- Turn ignition off. Disconnect Body Control Module (BCM) harness connector C4. Connect a test light between ground and terminal No. 3 (Dark Blue wire) at left body harness connector C308. If test light does not illuminate, replace BCM. If test light illuminates, repair short to voltage in Dark Blue wire between left body harness connector C308 and BCM.
- Turn ignition off. Measure resistance between ground and terminal No. 8 (Black wire) at left body harness connector C308. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Black wire between left body harness connector C308 and ground.
- Check wiring between left body harness connector C308 and fuel pump module. If problem exists, repair wiring as necessary. If problem does not exist, replace fuel pump module.
- Turn ignition off. Connect left body harness connector C308. Connect scan tool to Data Link Connector (DLC). Using scan tool, check fuel level voltage. If greater than 9 volts is displayed, repair open in Dark Blue wire between Body Control Module (BCM) and fuel pump module. If 9 volts or less is displayed, replace BCM.
Courtesy of CHRYSLER CORP.