1989 Lincoln Town Car Fuel Pump Relay Location: Complete Troubleshooting and Replacement Guide
If your 1989 Lincoln Town Car cranks but won't start, the fuel pump relay is one of the first things you should check. The fuel pump relay on a 1989 Lincoln Town Car is located in the trunk on the driver's side, between the power antenna and the left speaker, often covered by grey felt material . The relay controls power to the fuel pump, and when it fails, your engine won't get the fuel it needs to start. Before you tear into the fuel tank or replace expensive parts, testing and replacing this relay is a simple, low-cost step that solves many no-start problems.
Understanding the Fuel System on Your 1989 Lincoln Town Car
The 1989 Lincoln Town Car came with a 5.0L V8 engine that produced around 150 horsepower and 270 lb-ft of torque . The fuel system on this model uses an electric fuel pump mounted inside the fuel tank . The fuel pump relay acts as a switch that controls electrical current from the ignition system to the fuel pump. When you turn the key to the ON position, the relay should click and send power to the pump, which you can hear as a whining sound for about 2 to 4 seconds from the gas tank area .
The fuel pump relay is part of a larger circuit that includes the inertia switch, the EEC power relay, and various fuses and fusible links. If any part of this circuit fails, the fuel pump won't run, and your car won't start.
Where Exactly Is the Fuel Pump Relay Located?
The fuel pump relay on a 1989 Lincoln Town Car is located in the trunk on the driver's side. Here's how to find it:
Step 1: Open the trunk and look on the left side, near the rear of the car.
Step 2: Look between the power antenna and the left speaker. The relay is mounted on the side panel.
Step 3: The relay may be covered by grey felt material that surrounds the cargo area. You may need to pull back this material to see the relay.
Step 4: The relay has a button on the top end that is sometimes orange or white. This is actually the reset button for the inertia switch, which is built into the relay assembly .
Note: Some owners have reported confusion because the wiring colors at the relay socket do not match what is shown in some wiring diagrams. The standard wiring diagram for this car shows a pink and black wire going to the inertia switch, but you may find different colors at your relay . This is normal and does not mean you are looking at the wrong relay.
Common Problems That Cause No Power to the Fuel Pump
If you have no power to the fuel pump, the problem is usually one of these issues:
1. The Inertia Switch Has Tripped
The inertia switch is a safety device that cuts power to the fuel pump if the car experiences a sudden impact or hard braking. It is located in the trunk on the driver's side, often integrated with the fuel pump relay. To reset it, simply press the button on top downward toward the floor. If the car starts after this, the inertia switch was the problem .
2. The Fuel Pump Relay Has Failed
The relay itself can fail over time due to burned contact points or a broken coil. If the relay fails, no voltage reaches the fuel pump. You can test the relay by swapping it with another relay of the same type in the under-hood fuse box. If the car starts with the swapped relay, the original relay was bad .
3. The EEC Power Relay Is Bad
The EEC (Electronic Engine Control) power relay supplies power to the engine control module, which in turn controls the fuel pump relay. If the EEC relay fails, the fuel pump relay will not receive the signal to close. The EEC relay is located under the hood, near the washer fluid container, under one of the plastic covers . One owner of a 1993 Lincoln Town Car reported that replacing the EEC relay solved the exact same problem .
4. Blown Fusible Link or Fuse
Check the brown fusible link and the fuel pump fuse. These are located in the engine compartment fuse box. A blown fusible link will cut power to the entire fuel pump circuit .
5. Wiring Problems
The wiring from the relay to the inertia switch and from the inertia switch to the fuel pump can become corroded or damaged over time. This is especially common in older cars that have been exposed to moisture.
How to Test the Fuel Pump Relay and Circuit
You can test the fuel pump relay and circuit using a few simple tools. Here's a step-by-step method that works for the 1989 Lincoln Town Car:
Step 1: Listen for the Fuel Pump
Turn the ignition key to the ON position (do not start the engine). Listen near the gas tank for a whining sound that lasts 2 to 4 seconds. If you hear it, the relay and pump are working. If you don't hear anything, move to the next step .
Step 2: Check the Inertia Switch
Locate the inertia switch in the trunk. Press the reset button firmly. Try starting the car again. If it starts, the switch was tripped .
Step 3: Test for Power at the Relay
Use a test light or multimeter to check for voltage at the relay socket. With the key on, you should have 12 volts on two of the relay terminals. If you have power, the relay should be clicking when the key is turned on. If it doesn't click, the relay is likely bad .
Step 4: Jump the Relay
Remove the relay and use a jumper wire to connect terminals 30 and 87 in the relay socket. If the fuel pump runs and you hear it, the relay is bad and needs replacement .
Step 5: Check the Trigger Ground
The engine control module controls the fuel pump relay by turning the trigger ground on and off. If you have power at the relay but it won't click, the ECM may not be sending the ground signal. This can be tested with a computer-safe test light .
What to Do If the Relay Checks Out but the Pump Still Won't Run
If the relay is working correctly but the fuel pump still won't run, you may have a problem with the pump itself or the wiring to the pump. Here are some additional checks:
Check the Fuel Pump Fuse
The fuel pump fuse is located in the engine compartment fuse box. It is typically a 15-amp fuse. If it is blown, replace it and see if the pump runs. If the fuse blows again, there is a short in the pump circuit.
Check the Wiring Between the Relay and the Pump
The wiring from the relay to the inertia switch and from the inertia switch to the fuel pump can be tested with a multimeter. Look for breaks or corrosion in the wires.
Check the Fuel Pump Itself
If you have power at the pump but it doesn't run, the pump may be bad. You can test the pump by applying 12 volts directly to it. If it doesn't run, it needs replacement.
How to Replace the Fuel Pump Relay
Replacing the fuel pump relay on a 1989 Lincoln Town Car is a straightforward process. Here's what you need to do:
Tools Needed: A replacement relay, socket set, and possibly a pair of pliers.
Step 1: Disconnect the negative battery cable. This prevents accidental shorts while working on the electrical system .
Step 2: Locate the relay in the trunk as described above.
Step 3: Pull the old relay straight out of its socket. If it is tight, use a pair of pliers to grip it gently.
Step 4: Compare the new relay with the old one to make sure the prongs match.
Step 5: Push the new relay firmly into the socket until it seats properly.
Step 6: Reconnect the negative battery cable.
Step 7: Test the system by turning the key to the ON position. You should hear the fuel pump prime for 2 to 4 seconds .
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Additional Troubleshooting Tips for 1989 Lincoln Town Car Owners
If you have replaced the fuel pump relay and the fuel pump still won't run, here are a few more things to check based on common issues reported by owners of this model:
Check the Engine Control Module (ECM)
The ECM controls the fuel pump relay by turning the trigger ground on and off. If the ECM is bad, the relay will not receive the signal to close. This is a common problem on 1989 Lincoln Town Cars, especially if the car has been sitting for a long time .
Check for a Fuel Pressure Problem
Even if the pump runs, it may not be producing enough pressure to start the engine. The only way to know for sure is to test the fuel pressure at the fuel rail test port. The pressure should be around 38 psi for a 5.0L V8 engine .
Check the Fuel Filter
A clogged fuel filter can prevent fuel from reaching the engine, even if the pump is working correctly. The fuel filter is located along the fuel line, often near the fuel tank. Replace it if you haven't done so recently .
Check for a Bad Fuel Pump Driver Module
Some later Lincoln Town Car models have a fuel pump driver module (FPDM) located in the trunk, behind the rear passenger seat. However, the 1989 model does not use this module. The 1989 model uses a simple relay system .
Maintenance Tips to Prevent Future Fuel Pump Problems
Regular maintenance is the best way to prevent fuel pump problems on your 1989 Lincoln Town Car. Here are some tips to keep your fuel system in good shape:
Change the Fuel Filter Regularly
Replace the fuel filter every 15,000 to 30,000 miles. A clogged filter puts extra strain on the fuel pump and can cause it to fail prematurely .
Keep the Fuel Tank at Least Quarter Full
Running the fuel tank low can cause the pump to suck in air and debris from the bottom of the tank. This can damage the pump and reduce its lifespan.
Use Quality Fuel
Use fuel from reputable stations to avoid contamination that can clog the fuel system.
Listen for Unusual Noises
If you hear a loud whining or buzzing sound from the fuel tank area, the pump may be failing. Replace it before it leaves you stranded.
Final Thoughts
The fuel pump relay on a 1989 Lincoln Town Car is a critical component that is easy to find and replace. Located in the trunk on the driver's side, it is one of the first things to check when your car won't start. By following the troubleshooting steps in this guide, you can quickly diagnose whether the relay is the problem or if you need to look further into the fuel system.
If you determine that the fuel pump itself needs replacement, choose a high-quality product like KEMSO fuel pumps. KEMSO offers OEM replacement quality, high performance, and a lifetime warranty that gives you confidence in your repair. Visit https://www.kemsoracing.com/ today to find the perfect fuel pump for your 1989 Lincoln Town Car and keep your classic car running smoothly for years to come.