Mopar 68004113AA Fuel Pump/Level Unit Module

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To remove the upper section, use pliers to turn the lockring or use a hammer and brass drift to tap on the lockring counterclockwise. This will detach the upper section from the tank. Lift the upper section carefully, securing the rubber gasket to prevent it from falling into the tank. Detach and secure the fuel lines and electrical connector from the bottom side of the upper section.

To replace the fuel level sending unit, remove the fuel pump module. Lift the plastic locking tab while sliding the sending unit upward to remove it. The remaining installation steps are the reverse of removal.

Relieve the fuel pressure, remove the cap from the fuel pressure test port on the fuel rail and attach a fuel pressure gauge. Start the engine and check the pressure on the gauge. If the pressure is not within specifications, check for a restriction in the fuel system if the pressure is lower than specified. If the pressure is higher than specified, replace the fuel pressure regulator.

Inspect all fuel lines for leaks, set the parking brake, and have an assistant turn the ignition switch to the ON position while listening for the fuel pump sound. If the fuel pump is not operating, disconnect the fuel pump electrical connector and check for power at the fuel pump connector. If power is not available, check the fuel pump circuit, related fuses, fuel pump relay, and wiring. Check the ground circuit for continuity. If power and ground circuits are good but the fuel pump still does not operate, replace the fuel pump.

Check if the vehicle has a fuel pump access cover and remove it if present. If there is no access cover, the fuel tank must be lowered to gain access to the fuel pump module. Drill out the rivets on the rear cargo hold-down clamps and remove them. Fold the carpeting forward. Remove the access cover nuts and use a heat gun to apply heat to the cover, then carefully pry it up and remove it. With the ignition key in the On position, measure the voltage at the terminal coming out of the fuel pump module sending unit signal wire and compare it to the specified values.

Begin by relieving the fuel system pressure and disconnecting the cable from the negative battery terminal.