Replacing The Fuel Pump In A 2001 Taurus: Step-By-Step Guide

Replacing the fuel pump in a 2001 Ford Taurus can be a complex task. While it is possible to replace the fuel pump without removing the fuel tank, it is generally recommended to replace the entire fuel pump assembly. This is because there have been reports of issues with the wiring getting pinched between the tank and the body, which can cause problems. Additionally, a failing mechanical pressure regulator could also be the cause of fuel pump issues. Before attempting any repairs, it is important to consult a qualified mechanic or a trusted repair guide.

Check for power at the pump

To check for power at the pump of your 2001 Ford Taurus, you will need a digital multimeter. This will allow you to test the voltage and establish whether the pump is receiving enough electrical power.

Firstly, connect the multimeter to the positive and negative terminals of the fuel pump. Ensure there are no broken circuits between the fuel pump and relay. Insert the key into the ignition and turn it on without starting the engine. You should hear a soft whirl sound from the pump, indicating that it is ready to pump fuel.

Next, you will need to split the circuit into two. Have the ground phase on one side and the positive on the other. Use a jumper wire to power the fuel circuit and energize the pump. Now, connect the multimeter to the battery and the pump, both on their negative terminals. Conduct the tests using a live circuit wire. If the meter indicates a reading of more than 0.1, this means there is a loss of voltage power, possibly due to damaged connectors or poor wiring.

Now, connect the multimeter to the positive terminals of the pump and the battery. Also, test the output terminal of the fuel pump to see if it is functioning as expected. If the voltage drop is greater than 0.1 volts, this confirms that the harness connectors or wiring is faulty.

Finally, locate the fuel pump relay on the dashboard or engine compartment and remove it. Have someone switch on the ignition without starting the engine and check for voltage at the relay connector using the multimeter. Replace the relay and test the fuel pump connector at the back of the car for incoming voltage using the multimeter.

If you are still experiencing issues, you may need to remove the fuel pump from the vehicle and test it directly with jumper wires connected to the battery.

Check the inertia switch

To check the inertia switch of your 2001 Taurus, you must first locate the switch. The fuel pump shut-off (inertia) switch is located on the right side of the trunk behind the trunk liner. To access the switch, you will need to remove the inner trim panel.

Once you have located the switch, make sure that your vehicle is turned off. Then, push in the fuel pump shut-off (inertia) switch. After that, turn the ignition to the "on" position and wait a few seconds before returning the key to the "off" position.

If your engine cranks but does not start, the fuel pump shut-off (inertia) switch may have been activated, and you will need to reset it using the steps outlined above.

It is also important to note that you should never test power circuits with a DMM; always use a test light instead. Additionally, if you are experiencing issues with your fuel pump, it is recommended to replace the whole module, as it contains the wiring that could be damaged or partially broken.

Check for power at the inertia switch and pump when the car won't start

When your 2001 Ford Taurus won't start, checking for power at the inertia switch and pump is a crucial step in diagnosing the issue. Here's a detailed guide on how to do it:

Understand the Inertia Switch:

The inertia switch is a safety feature designed to cut off power to the fuel pump in the event of a collision. It's typically located in the trunk or rear cargo area of the vehicle. When activated, the switch will prevent the fuel pump from running, which can help prevent fires or other hazards.

Check for Voltage:

Use a voltmeter or a test light to check for voltage at the inertia switch. With the key turned to the "on" position, you should see 12 volts at the switch. If you don't, it could indicate a problem with the wiring or the switch itself.

Test the Inertia Switch:

To test the inertia switch, you can jump the switch by connecting a wire from the battery positive post to the switch. If the pump runs with the switch jumped, it likely means there is an issue with the wiring or the switch.

Check the Fuses:

If you're not getting power to the inertia switch, the next step is to check the fuses. In the case of the 2001 Taurus, you'll want to check fuse F116 in the under-hood fuse panel and fuse F225 in the interior fuse panel. Both fuses need to be intact and functioning for the fuel pump to operate.

Verify the PCM Ground:

The PCM (Powertrain Control Module) plays a crucial role in the fuel pump circuit. To check if it's functioning correctly, access the back of the fuse panel and test for a ground on the orange/blue wire (pin #2) with the engine cranking. If there's no ground, it could indicate a PCM issue.

Test the Fuel Pump Relay:

The fuel pump relay is responsible for sending power to the fuel pump. To test it, you can jump pins #3 and #5 on the relay. If the pump runs with the relay jumped, it likely means there's an issue with the wiring or the relay itself.

Check Voltage at the Fuel Pump:

Finally, if all other tests check out, use your voltmeter to check for voltage at the fuel pump connector. With the key in the "on" position, you should see battery voltage at the connector. If there's no voltage, it could indicate a problem with the wiring between the inertia switch and the pump.

Remember to exercise caution when working with electrical components, and always refer to a qualified mechanic if you're unsure about any part of the process.

Check fuses f116 and f225

To check fuses f116 and f225 on a 2001 Ford Taurus, follow these steps:

First, locate the f116 fuse in the under-hood fuse panel. This fuse powers the fuel pump. Then, locate the f225 fuse in the interior fuse panel. This fuse powers the PCM power relay and the coil in the fuel pump relay.

When checking these fuses, look for any black marks on the blades, which could indicate arc signs. Ensure that the fuses are tight and free from damage. Check for power on both sides of each fuse with the key on to ensure you're getting key-on voltage.

If the fuses appear intact and undamaged, and you're getting power on both sides, the problem may lie elsewhere in the circuit. In this case, consider consulting a professional mechanic or seeking further troubleshooting advice.

Check for power at the PCM power relay

To check for power at the PCM power relay of your 2001 Ford Taurus, you will need to locate the power distribution box. This is usually found in the engine bay, often near the battery. It is a black box with a removable lid, and inside you will see a row of relays.

The PCM power relay is often labelled as such, or it may be labelled as spot 31. It is a regular, Bosch-style 30A relay. You can try to switch it with another relay of the same type, such as the A/C or horn relay, to see if that helps. You can also try giving it a wiggle or a thump to see if it wakes up and the problem clears.

If the relay is removed and there is still power to the red wire in the relay centre when the key is in the 'start' position, there is likely a power short.

If the relay is sticking, the cooling fans will always run and the fuel pump will keep cycling.

If you are experiencing issues with your PCM, it is recommended to check the fuse to the DLC (a 15-amp fuse under the dash). You can also try to beep the horn, as the PCM power relay and the horn relay are on the same fuse.

Frequently asked questions