1. Faulty Power Relay: The power relay supplies voltage to the fuel pump. Check the relay and make sure it's functioning properly. If it's faulty, replace the relay.
2. Fuel Pump Circuit Wiring: Inspect the wiring leading to the fuel pump. Look for any damaged, frayed, or loose connections. If you find any issues, repair or replace the affected wires.
3. Fuel Pump Ground: Ensure the fuel pump has a good ground connection. Check the ground wire and make sure it's securely attached to a clean, bare metal surface.
4. Fuel Pump Inertia Switch: Some vehicles are equipped with a fuel pump inertia switch, which can cut off power to the fuel pump in case of an accident. Locate the switch and make sure it hasn't been tripped.
5. Electrical System Issues: If the above items check out, there could be an underlying issue with the vehicle's electrical system causing the low voltage. Have a qualified mechanic diagnose and repair the problem.
Remember to follow proper safety precautions when working on the fuel system and consult your vehicle's service manual for specific instructions and procedures.
