The fuel pump relay is a critical component in your 2000 Ford Ranger's fuel system. It controls the power supply to the fuel pump, ensuring your engine receives the necessary fuel to run properly. This guide will help you locate, understand, and troubleshoot issues related to the fuel pump relay in your Ranger.

Fuel Pump Relay Location

The fuel pump relay in a 2000 Ford Ranger is located in the engine compartment fuse box. To find it:

1. Open the hood of your Ranger

2. Locate the fuse box on the driver's side, near the firewall

3. Remove the fuse box cover

4. Look for the relay labeled "R5" or "Fuel Pump Relay"

The fuel pump relay is typically a small, cube-shaped component with four or five prongs on the bottom.

Function of the Fuel Pump Relay

The fuel pump relay serves as a switch that controls power to the fuel pump. When you turn the key to start your Ranger, the relay closes to provide 12-volt power from the battery to the in-tank fuel pump. This allows the pump to pressurize the fuel system, enabling your engine to start and run.

Common Symptoms of a Failing Fuel Pump Relay

If your 2000 Ford Ranger's fuel pump relay is failing, you may experience:

  • Engine hesitation or stalling
  • Difficulty starting the vehicle
  • Loss of power while driving
  • No start condition (engine cranks but won't start)
  • Check Engine light illumination

Troubleshooting the Fuel Pump Relay

To determine if your fuel pump relay is the culprit:

1. Listen for the fuel pump: Turn the key to "On" without starting the engine. You should hear a brief whirring sound from the fuel tank area.

2. Check the fuse: Inspect the 20-amp fuel pump fuse (labeled "FM9") in the engine compartment fuse box.

3. Swap the relay: Try swapping the fuel pump relay with another identical relay (like the horn relay) to see if the problem resolves.

4. Test with a multimeter: Use a multimeter to check for proper voltage at the relay terminals.

Replacing the Fuel Pump Relay

If you've determined that the relay is faulty, replacing it is relatively simple:

1. Locate the relay in the fuse box

2. Gently pull the old relay straight out

3. Insert the new relay, ensuring it's fully seated

4. Test the vehicle to confirm proper operation

A replacement fuel pump relay for a 2000 Ford Ranger typically costs between $15 and $20.

Preventive Maintenance

To help prevent fuel pump relay issues:

  • Keep your battery and charging system in good condition
  • Regularly clean the fuse box to prevent corrosion
  • Address any electrical system issues promptly

Remember, while the fuel pump relay is a common culprit for fuel system issues, it's not always the cause. If you're unsure, it's best to consult with a qualified mechanic for a proper diagnosis.

FAQs About 2000 Ford Ranger Fuel Pump Relay

    • Can a bad fuel pump relay cause no start?
      Yes, a faulty fuel pump relay can prevent your Ranger from starting by failing to supply power to the fuel pump.
    • How long does a fuel pump relay typically last?
      A fuel pump relay can last the lifetime of the vehicle, but they can fail due to heat, electrical overload, or general wear over time.
    • Can I drive with a bypassed fuel pump relay?
      While it's possible to bypass the relay temporarily, it's not recommended for long-term use as it bypasses important safety features.