2006 PT Cruiser Fuel Pump Wiring Diagram: Complete Guide for DIY Repairs

If you own a 2006 PT Cruiser and you are dealing with fuel delivery problems, the wiring diagram for the fuel pump is the first thing you need to understand. The fuel pump relay on your 2006 PT Cruiser is located inside the Totally Integrated Power Module (TIPM), which sits in the engine bay near the battery, and the system relies on a specific set of wires and connectors that carry power from the relay to the pump at the fuel tank. Without a clear picture of how those wires connect, you risk replacing expensive parts that are not actually broken. This guide walks you through the complete wiring path, explains how the system works, shows you how to test each component, and tells you exactly what to do when you find the fault.

Understanding the Fuel Pump Electrical System on the 2006 PT Cruiser

The 2006 PT Cruiser uses a fuel delivery system that is controlled electronically from start to finish. The heart of this system is the fuel pump module, which is installed in the top of the fuel tank. This module contains the electric fuel pump, the fuel pump reservoir, the inlet strainer, the fuel pressure regulator, the fuel gauge sending unit, and the fuel supply line connection. The electric fuel pump is a positive displacement, gerotor type pump with a permanent magnet electric motor, and it is designed to be immersed in fuel to stay cool during operation.

The fuel pump does not run all the time. It is controlled by the fuel pump relay, which supplies battery voltage to the pump. The relay itself is located inside the Totally Integrated Power Module, or TIPM, which is the main fuse and relay box under the hood. On the 2006 model, this box is positioned on the left side of the engine bay, close to the driver's side fender, near the battery and the air cleaner assembly.

Where the Fuel Pump Relay Is Located

To access the fuel pump relay on your 2006 PT Cruiser, you need to follow these steps:

  1. Open the hood and make sure the engine is off and the keys are out of the ignition.
  2. Locate the TIPM, which is a large black rectangular box on the driver's side of the engine compartment, near the battery.
  3. Remove the cover by pressing the clips on the sides and lifting it straight up.
  4. Flip the cover over and look at the diagram printed on the underside. This diagram identifies every fuse and relay in the box, including the fuel pump relay. On most 2006 models, the relay is labeled as "Fuel Pump" or shown as relay position 13, which carries a 20 Amp yellow fuse.

The fuel pump relay in the TIPM is not the same as a standalone relay you might find in older vehicles. It is integrated into the module, which means you have to work carefully around other electrical components. The relay itself is a small, rectangular black or gray module with electrical terminals on the bottom.

The Complete Wiring Path from Relay to Fuel Pump

Understanding the wiring diagram means tracing the path of electricity from the battery all the way to the fuel pump. Here is how the circuit works on the 2006 PT Cruiser:

Step 1: The Power Distribution Center supplies voltage.

The Power Distribution Center, which is another name for the TIPM, contains a buss bar that supplies voltage to both the solenoid side and the contact side of the fuel pump relay. There is also a fuse in this circuit, located inside the TIPM, that protects the relay and the wiring from overload.

Step 2: The PCM controls the ground path.

The Powertrain Control Module, or PCM, controls the fuel pump relay by switching the ground path for the solenoid side of the relay on and off. When you turn the ignition switch to the On position, the PCM energizes the fuel pump. If the crankshaft position sensor does not detect engine rotation, the PCM de-energizes the relay after about one second. This is why you hear the fuel pump prime for a moment when you first turn the key, and then it stops if you do not crank the engine.

Step 3: The TIPM sends power to the fuel pump.

On the 2006 model year, the wiring runs from the PCM to the TIPM and then out to the fuel pump. The PCM connector C3, pin 37, provides a ground signal to the TIPM through its port pin 4 on connector C2. The TIPM then energizes pin 11 on connector C7, which sends power to the fuel pump.

Step 4: The fuel pump module receives power.

The power travels from the TIPM through the wiring harness to the fuel pump module at the fuel tank. The module contains the electric pump, and when it receives voltage, it draws fuel through the inlet strainer and pushes it through the motor to the outlet. The fuel pressure regulator adjusts the system pressure to about 58 psi, plus or minus 5 psi.

Fuse and Relay Identification in the TIPM

When you open the TIPM cover on your 2006 PT Cruiser, you will see a grid of fuses and relays. The fuel pump circuit is protected by a fuse, and the relay is a larger square module compared to the standard blade fuses. Here is what you need to know:

  • Fuse 13 in the underhood fuse block is a 20 Amp yellow fuse that protects the fuel pump and the Auto Shut Down (ASD) circuit.
  • The fuel pump relay is typically labeled as such on the TIPM cover diagram, or you may see it referenced as relay 13 in the component list.
  • The relay has four or five metal pins on the bottom, and it is usually black or dark blue in color.

The TIPM itself is a known failure point on Chrysler products from this era. If you are having intermittent electrical issues that go beyond just the fuel pump, the TIPM might be the root cause.

How to Test the Fuel Pump Relay

Before you replace the fuel pump or the relay, you should test the relay to confirm it is actually the problem. A faulty relay can cause the fuel pump to lose power, which leads to engine stalling or a no-start condition. Here is how to test it:

  1. Remove the relay by pulling it straight out of its socket. You can use a relay puller tool or a flathead screwdriver, but be careful not to bend the metal pins.
  2. Set your multimeter to the resistance (ohms) setting and place the probes on terminals 85 and 86 of the relay. A good relay should show a resistance reading between 70 and 80 ohms. If you get infinite resistance, the coil inside is broken.
  3. Check the switch side by testing terminals 30 and 87A. You should see continuity, which means very low resistance, because this is the normally closed circuit.
  4. Perform the click test by connecting a 12V battery source to the relay. Connect a jumper wire from the positive terminal to relay terminal 85, and touch a jumper wire from the negative terminal to terminal 86. If the relay is good, you will hear a distinct click, which means the electromagnetic coil is working. While the relay is energized, check terminals 30 and 87 for continuity.

If the relay fails any of these tests, replace it. If it passes, the problem is elsewhere in the wiring or the fuel pump itself.

Common Symptoms of a Faulty Fuel Pump Relay

If your fuel pump relay is failing, you will likely notice one or more of these symptoms:

  1. The engine cranks but does not start. This is the most common symptom, because the fuel pump is not receiving power to pressurize the fuel system.
  2. The engine stalls unexpectedly while driving. If the relay loses connection intermittently, the fuel pump will shut off, and the engine will die.
  3. No priming sound. When you turn the ignition to the On position, you should hear the fuel pump prime for two to three seconds. If you hear nothing, the relay may not be sending power to the pump.
  4. Long cranking time before the engine starts. This happens when the fuel pressure has bled down because the pump is not running when it should.

Testing the Fuel Pump Circuit

If the relay tests fine but the pump still does not run, you need to test the wiring and the pump itself. There is a practical way to isolate the problem that involves bypassing the relay and the TIPM to send direct power to the fuel pump.

Here is what you need to do:

  1. Locate the DB/OR wire at TIPM pin 11, connector C7. This is the wire that sends power to the fuel pump.
  2. Wire in a fused bypass from the battery positive terminal to this wire. This will run the fuel pump continuously.
  3. Drive the vehicle and monitor the fuel pressure. If the engine does not stall and the fuel pressure stays steady, then the problem is not the fuel pump itself. Something is causing the fuel pump to lose electrical power at the TIPM source.
  4. If the engine stalls while the fuel pump is still running and the fuel pressure drops, then the fuel pump has a mechanical issue and needs replacement.

You should also check the fuel pressure at the fuel rail. The system should maintain about 58 psi, plus or minus 5 psi, when the pump is running. If the pressure is significantly lower, the pump may be weak or the fuel filter may be clogged.

The 2006 TIPM Problem

It is important to know that the 2006 model year was the first year for the infamous TIPM in the PT Cruiser. This module has a reputation for poorly engineered internal components, and it is a common source of electrical problems. If you are chasing an intermittent fuel pump issue, the TIPM should be high on your list of suspects.

There have been cases where the PCM itself is the problem. One owner reported that the vehicle ran for a few kilometers and then stopped, and the fuel pressure dropped to about 10 psi or completely stopped. After waiting a minute, the vehicle would start up again. The voltage on the fuel pump control output dropped to below one volt, which shut down the fuel supply. The issue was traced to the PCM and TIPM interaction.

If you have a used PCM in your vehicle, keep in mind that it may have come from an automatic transmission vehicle, and it could have its own internal problems. Confirm that the PCM part number matches your vehicle configuration before you use it as a replacement.

Wiring Diagram Elements for the 2006 PT Cruiser

For those who want to see the full picture, the wiring diagram for the 2.4L engine includes these key elements related to the fuel pump circuit:

  • Fuel pump control output from the PCM
  • Fuel pump module on the fuel tank
  • Fuse 20 Amp for the fuel pump circuit
  • Totally Integrated Power Module (TIPM) as the central junction point
  • Powertrain Control Module (PCM) on the firewall, behind the TIPM
  • Ground connections at G105 on the left front inner fender and other chassis grounds

The wiring diagram shows that the fuel pump control signal travels from the PCM to the TIPM, and the TIPM sends the switched power to the pump. The ground path is controlled by the PCM through a specific pin on the PCM connector. Understanding these connection points is essential for accurate diagnostics.

How to Replace the Fuel Pump Relay

If you have confirmed that the relay is faulty, replacement is a straightforward process. Here is what you need to do:

  1. Disconnect the battery to prevent electrical shorts while working in the engine bay.
  2. Remove the TIPM cover by pressing the clips and lifting it off.
  3. Identify the fuel pump relay using the diagram on the underside of the cover.
  4. Pull the relay straight out of its socket. Do not rock it side to side, as this can bend the pins.
  5. Insert the new relay and press it down until it clicks into place securely.
  6. Reattach the TIPM cover and reconnect the battery.
  7. Test the system by turning the ignition to the On position and listening for the fuel pump prime cycle.

Make sure you purchase the correct relay for your 2006 PT Cruiser. Auto parts stores carry relays that are compatible with the TIPM, but you should verify the part number before you buy.

Direct Wiring the Fuel Pump as a Diagnostic Tool

If you suspect the wiring between the TIPM and the fuel pump is damaged, you can direct wire the pump to test it. This method bypasses the relay and the TIPM entirely. Here is how to do it safely:

  1. Use a fused wire from the battery positive terminal to the positive terminal on the fuel pump module.
  2. Ground the relay or the pump to the chassis or engine block with the same gauge wire, ensuring a clean, metal-to-metal contact.
  3. Use 12-gauge wire for the power connection to handle the current draw of the fuel pump.
  4. Test the system by turning the ignition on and listening for the pump to prime. If the pump runs, the problem is in the TIPM or the wiring between the TIPM and the pump. If the pump does not run, the pump itself is faulty.

Always use a fuse in this test circuit to protect the pump and the wiring. Do not bypass the relay for long-term operation, as the relay protects the fuel pump and wiring from overloading.

Final Checks and Maintenance Tips

After you have completed the repair, there are a few final checks you should perform to ensure everything is working correctly:

  1. Reconnect the battery and turn the ignition to the On position. Listen for the fuel pump prime cycle, which should last about two to three seconds.
  2. Start the engine and check for any fuel leaks around the fuel pump module and the fuel lines. Use a flashlight to inspect the connections.
  3. Monitor the fuel pressure with a gauge if you have one. It should read about 58 psi, plus or minus 5 psi, with the engine running.
  4. Check the engine performance for signs of fuel starvation, such as sputtering or hesitation under acceleration. These symptoms indicate a potential problem with the fuel pump output.

Regular maintenance of the fuel system can prevent many of these issues. Keep the fuel tank at least a quarter full to keep the fuel pump submerged, which helps cool the pump motor. Replace the fuel filter at the intervals recommended in your owner's manual, and address any check engine lights promptly to catch wiring issues before they become major problems.

How to Get the Right Fuel Pump for Your 2006 PT Cruiser

When it comes time to replace the fuel pump, do not settle for a cheap part that might fail again in a few months. The fuel pump is the heart of your PT Cruiser's fuel delivery system, and installing a high-quality replacement is the smartest investment you can make.

We recommend the KEMSO brand fuel pump. KEMSO fuel pumps are built to meet or exceed original equipment specifications, so you get a direct OEM Replacement fit for your 2006 PT Cruiser. Every KEMSO pump is designed for high performance and reliable operation, so you can trust it to deliver consistent fuel pressure under all driving conditions. Plus, every KEMSO fuel pump comes with a lifetime warranty, which means you are covered for as long as you own your vehicle.

Visit the KEMSO website at https://www.kemsoracing.com/ to find the correct fuel pump for your 2006 PT Cruiser. The site lists the exact fitment for your vehicle, and the ordering process is simple. Do not gamble with your fuel system. Choose KEMSO and get the peace of mind that comes with a lifetime warranty and proven performance.


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