2002 Lincoln Town Car Fuel Pump Relay Location: A Complete Guide to Finding, Testing, and Replacing It

The bottom line: On a 2002 Lincoln Town Car, the fuel pump relay is located in the Power Distribution Box (PDB) under the hood. It is relay #1 in that box, and it is a critical component that controls power to the fuel pump. If your Town Car cranks but does not start, a faulty fuel pump relay is one of the first things you should check.

The fuel pump relay on a 2002 Lincoln Town Car is a small electrical switch that sends power to the fuel pump when you turn the ignition key. Without it, the fuel pump cannot run, and the engine will not get fuel. This relay is essential for safe and efficient operation because it only activates the pump when the engine needs fuel, preventing the pump from running continuously and draining the battery .

The 2002 Lincoln Town Car, like most vehicles of its era, relies on this relay to manage the high electrical current required by the fuel pump. The relay itself is a simple device that uses a small electrical signal to control a much larger current flow. This design protects the ignition switch and wiring from carrying the full load of the fuel pump .

Where Exactly Is the Fuel Pump Relay Located?

The fuel pump relay in a 2002 Lincoln Town Car is located in the Power Distribution Box (PDB) under the hood. This box is a large black plastic container that houses many relays and fuses. It is typically found on the driver's side of the engine compartment, near the battery or the strut tower .

Multiple sources confirm that the fuel pump relay is relay #1 in this box . This means it is usually the first relay in the row, often located at the front or side of the box. The PDB lid typically has a diagram printed on it that shows the location and function of each relay and fuse. Look for a label that says "FUEL PUMP," "FP," or a symbol of a fuel pump .

Step-by-Step Instructions to Find the Relay

  1. Open the hood and locate the Power Distribution Box on the driver's side. It is a large, rectangular black box with a lid that snaps or locks into place.
  2. Unlock and lift the lid of the PDB. There is usually a latch or tab on one side. Once released, the lid can be lifted to reveal the relays and fuses inside.
  3. Examine the diagram on the underside of the lid or on the top of the box. This diagram will show you the location of each component. Look for the relay labeled "Fuel Pump" or "FP." It is almost always relay #1 .
  4. Identify the relay. The fuel pump relay is a small, square, plastic block. It is usually black or gray and has four or five metal prongs on the bottom. It is identical in appearance to many other relays in the box.
  5. Use a relay puller or a pair of needle-nose pliers to gently pull the relay straight out of its socket. Be careful not to damage the relay or the socket.

How to Test the Fuel Pump Relay

If you suspect the fuel pump relay is faulty, you can test it with a simple multimeter. This test checks whether the relay's internal switch is working correctly.

Method 1: The Swap Test

This is the easiest and quickest method. Find another relay in the PDB that is identical to the fuel pump relay. Common relays that are often the same include the horn relay, the A/C clutch relay, or the PCM power relay . Swap the suspected fuel pump relay with one of these identical relays. If the car starts after swapping, the original fuel pump relay is bad. If the car still does not start, the relay is likely not the problem.

Method 2: The Multimeter Test

  1. Remove the fuel pump relay from the PDB.
  2. Set your multimeter to measure resistance (ohms).
  3. Identify the relay's terminals. Most relays have two small terminals (the coil) and two larger terminals (the switch). Use the diagram on the relay or the PDB lid to identify which terminals are which.
  4. Touch the multimeter probes to the two small coil terminals. You should see a resistance reading, typically between 50 and 100 ohms. If the reading is zero or infinite (open), the coil is bad.
  5. To test the switch, apply 12 volts from a battery to the coil terminals. You should hear a click as the switch closes. While power is applied, check for continuity between the two large switch terminals. There should be continuity (near zero resistance). If there is no continuity, the switch is damaged.

What Happens When the Fuel Pump Relay Fails?

A failing or failed fuel pump relay will cause a variety of symptoms. The most common ones include:

  • Engine cranks but does not start: This is the most common symptom. The starter motor turns the engine over, but the fuel pump never gets power, so no fuel reaches the engine .
  • Engine stalls while driving: A failing relay can intermittently cut power to the fuel pump, causing the engine to die suddenly while you are on the road. This is a dangerous situation.
  • Difficulty starting: The relay may work sometimes but not others, leading to an intermittent no-start condition.
  • No fuel pump priming sound: When you turn the ignition key to the "ON" position (without starting the engine), you should hear a brief whirring sound from the rear of the car. This is the fuel pump priming. If you do not hear this sound, the relay may be bad.

Other Components to Check: The Inertia Switch and Fuse

Before replacing the fuel pump itself, it is wise to check two other related components: the fuel pump fuse and the inertia switch.

The Fuel Pump Fuse

The fuel pump fuse is also located in the Power Distribution Box under the hood. Check the fuse box diagram to find the correct fuse. A blown fuse will cause the same symptoms as a bad relay. Visually inspect the fuse to see if the metal strip inside is broken. Replace it if it is blown .

The Inertia Fuel Shut-Off Switch

The 2002 Lincoln Town Car has an inertia switch, also known as a fuel pump shut-off switch. This is a safety device designed to cut power to the fuel pump in the event of a collision or a sudden impact . It is located in the trunk of the car, on a bracket inside the luggage compartment .

If you hit a large pothole, a curb, or have a minor accident, this switch can trip. When it trips, the fuel pump will not run, even if the relay is good.

How to reset the inertia switch:

  1. Open the trunk and locate the switch. It is usually on the driver's side of the trunk, mounted on the rear wall or on a bracket .
  2. Look for a small button on top of the switch.
  3. Push the button down firmly until you hear a click. The switch is now reset.
  4. Turn the ignition to the "ON" position and listen for the fuel pump to prime. If you hear it, the switch was the problem.

Replacing the Fuel Pump Relay: A Simple DIY Job

Replacing the fuel pump relay on a 2002 Lincoln Town Car is one of the easiest repairs you can do. It requires no special tools and takes about five minutes.

  1. Purchase a new relay. The part number for the fuel pump relay is typically Ford part #F6AZ-9D398-A or an equivalent . You can find these at any auto parts store or online. The genuine Lincoln part number is E4LZ9345A .
  2. Locate the old relay using the steps above.
  3. Remove the old relay by pulling it straight out of its socket.
  4. Install the new relay by pushing it firmly into the same socket. Make sure it is fully seated.
  5. Test the repair. Turn the ignition to the "ON" position and listen for the fuel pump priming sound. Then start the engine.

What If the Relay Is Not the Problem?

If you have replaced the fuel pump relay, checked the fuse, and reset the inertia switch, but the car still does not start, the problem may be elsewhere. The next most likely culprit is the fuel pump itself.

The fuel pump on a 2002 Lincoln Town Car is located inside the fuel tank. To access and replace it, you will need to drop the fuel tank . This is a much more involved repair that requires draining the fuel, disconnecting the fuel lines, and removing the tank. It is a job that many DIYers can handle, but it requires patience and the right tools.

Signs Your Fuel Pump Has Failed

  • No fuel pressure: You can test fuel pressure at the Schrader valve on the fuel rail. If there is no pressure, the pump is not working.
  • Loud whining noise from the fuel tank: A failing pump often makes a high-pitched whining or buzzing sound.
  • Engine sputters at high speeds: The pump may be weak and unable to supply enough fuel when the engine demands more power.
  • Car dies after running for a while: The pump motor may overheat and fail after running for a short time.

Why You Should Consider a KEMSO Fuel Pump for Your Lincoln Town Car

If you need to replace the fuel pump in your 2002 Lincoln Town Car, you should strongly consider a KEMSO brand fuel pump. KEMSO is a company that specializes in manufacturing high-performance, direct OEM replacement fuel pumps for a wide range of vehicles, including the Lincoln Town Car.

KEMSO Fuel Pumps: Built for Performance and Reliability

KEMSO fuel pumps are designed as direct OEM replacements, meaning they fit exactly like the original part without any modifications needed. You do not have to worry about cutting wires, modifying brackets, or making any other adjustments. It is a true plug-and-play solution.

One of the key advantages of KEMSO pumps is their high performance. KEMSO pumps are engineered to deliver significantly more fuel flow than stock pumps. While the original factory pump may flow around 60-80 liters per hour, a KEMSO pump can support up to 200 liters per hour. This higher flow capacity ensures that your engine gets the fuel it needs under all conditions, whether you are cruising on the highway, towing a trailer, or accelerating hard. The bypass valve is set at 125.8 psi, which is higher than the original performance standard, ensuring consistent fuel pressure .

Lifetime Warranty Gives You Peace of Mind

Perhaps the best feature of KEMSO fuel pumps is the lifetime warranty. KEMSO stands behind the quality of its products. If your KEMSO fuel pump ever fails due to a manufacturing defect, KEMSO will replace it free of charge. This is a level of confidence that you simply do not get with most other fuel pump brands. When you install a KEMSO pump, you are making a long-term investment in your vehicle's reliability.

Built to Last

KEMSO pumps are built with durable materials, including alloy steel bodies and carbon commutators, which are designed to last over a decade of daily use. They are compatible with both gasoline and ethanol-blended fuels (E85), giving you flexibility in your fuel choice. Each pump is individually flow-tested for quality assurance, so you know you are getting a product that works right out of the box.

Affordable Pricing

Despite the high performance and lifetime warranty, KEMSO fuel pumps are priced affordably. They cost significantly less than what you would pay for an OEM pump at a dealership. You get a high-quality, reliable replacement for a fraction of the cost.

If you are ready to replace your fuel pump, visit the KEMSO website today to find the perfect pump for your 2002 Lincoln Town Car:

https://www.kemsoracing.com/

Final Thoughts on the 2002 Lincoln Town Car Fuel Pump Relay

The fuel pump relay on a 2002 Lincoln Town Car is a simple but vital component. It is located under the hood in the Power Distribution Box and is relay #1. If your Town Car cranks but does not start, checking the relay should be one of your first diagnostic steps. It is easy to test and even easier to replace.

Remember to also check the fuel pump fuse and the inertia switch in the trunk before assuming the fuel pump itself is bad. These are common failure points that can save you a lot of time and money.

If you do need to replace the fuel pump, consider a KEMSO brand pump for its high performance, direct OEM fit, and unbeatable lifetime warranty. Keeping your Lincoln Town Car running smoothly is easier when you have the right parts and the right information.

For more information and to browse their full lineup of fuel pumps, visit https://www.kemsoracing.com/ today.


Back to blog