1. Check the fuel pump fuse: The fuel pump fuse is located in the engine compartment fuse box. Check to make sure that the fuse is intact and not blown. If the fuse is blown, replace it with a new fuse of the same amperage.
2. Check the fuel pump relay: The fuel pump relay is located in the same fuse box as the fuel pump fuse. Check to make sure that the relay is seated properly in its socket and that the terminals are clean and free of corrosion. If the relay is loose, reseat it firmly. If the relay is corroded, clean the terminals with a wire brush.
3. Check the fuel pump wiring: Inspect the wiring harness that connects the fuel pump to the fuse box and the fuel pump relay. Look for any damaged or loose wires. If you find any damaged wires, repair or replace them as necessary.
4. Check the fuel pump ground: The fuel pump is grounded to the vehicle's chassis. Check to make sure that the ground connection is clean and tight. If the ground connection is loose, clean it and tighten it.
5. Test the fuel pump: If you have ruled out all of the above potential causes, you may need to test the fuel pump itself. To do this, you will need a multimeter. Disconnect the fuel pump connector and set the multimeter to measure voltage. Connect the positive probe of the multimeter to the fuel pump power terminal and the negative probe to the ground terminal. Turn the ignition key to the "ON" position but do not start the engine. The multimeter should read 12 volts. If the multimeter does not read 12 volts, the fuel pump is likely faulty and needs to be replaced.
6. Check for a faulty fuel pump control module: The fuel pump control module (FPCM) is responsible for sending power to the fuel pump. If the FPCM is faulty, it can prevent the fuel pump from receiving power. To check the FPCM, locate it and inspect it for any signs of damage. If the FPCM is damaged, it will need to be replaced.
7. Check the ignition switch: The ignition switch provides power to the fuel pump control module. If the ignition switch is faulty, it can prevent the fuel pump from receiving power. To check the ignition switch, turn the key to the "ON" position and listen for a click. If you don't hear a click, the ignition switch may be faulty and will need to be replaced.
If you are still unable to resolve the issue, you may need to take your vehicle to a qualified mechanic for further diagnosis and repair.
