2000 Jeep Cherokee Xj Fuel Pump Wiring

By | January 22, 2023

The 2000 Jeep Cherokee XJ fuel pump wiring is a relatively simple system that can be easily diagnosed and repaired by a DIYer. The fuel pump is located in the fuel tank, and is driven by an electric motor. The motor is controlled by a fuel pump relay, which is located in the engine compartment. The fuel pump relay is activated by the fuel pump control module (FPCM), which is located under the dash.

The fuel pump wiring diagram is shown below.

2000 Jeep Cherokee XJ Fuel Pump Wiring Diagram

To test the fuel pump, you will need a multimeter. First, disconnect the negative battery cable. Then, locate the fuel pump relay in the engine compartment. The relay is a small, black box with two terminals.

With the multimeter set to ohms, connect one probe to the "87" terminal of the relay and the other probe to the "30" terminal. The multimeter should read a resistance of 0 ohms. If the multimeter reads infinite ohms, the fuel pump relay is bad and will need to be replaced.

To test the fuel pump motor, you will need to remove the fuel tank. Once the fuel tank is removed, you will see the fuel pump. The fuel pump is a black, cylindrical object with two wires connected to it.

With the multimeter set to volts, connect one probe to the positive battery terminal and the other probe to the wire connected to the fuel pump motor. The multimeter should read approximately 12 volts. If the multimeter reads less than 12 volts, the fuel pump motor is bad and will need to be replaced.

If the fuel pump relay and fuel pump motor are both good, the problem is likely with the fuel pump control module (FPCM). The FPCM is located under the dash. To test the FPCM, you will need a scan tool.

With the scan tool connected to the OBD-II port, turn on the ignition. The scan tool should display the fuel pump control module (FPCM) PIDs. The PIDs that you should check include:

  • FPCM Status
  • Fuel Pump Relay Status
  • Fuel Pump Voltage

If the FPCM PIDs are not correct, the FPCM is bad and will need to be replaced.

Replacing the fuel pump relay, fuel pump motor, or FPCM is a relatively simple task that can be completed by a DIYer. However, if you are not comfortable working on cars, it is best to have the work done by a qualified mechanic.


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