2006 Dodge Charger Fuel Pump Relay: Location, Symptoms, and Replacement Guide

The fuel pump relay on a 2006 Dodge Charger is located inside the Totally Integrated Power Module (TIPM), which is the main fuse box mounted under the hood on the driver's side, right next to the battery. This black plastic box houses the relay labeled as R4 in the TIPM diagram. If your Charger cranks but won't start, or you don't hear the fuel pump prime when you turn the key, the fuel pump relay is one of the first components you should check. The relay itself is a small, interchangeable mini-relay that manages the flow of power from the battery to the electric fuel pump mounted inside the fuel tank. This guide walks you through everything you need to know about finding, testing, and replacing this critical component, plus what to do when the relay is not the root cause of your fuel delivery problems.

Understanding the Fuel System on Your 2006 Charger

Before you start digging into the relay, it helps to understand how the fuel system works on your vehicle. The 2006 Dodge Charger uses an electric fuel pump that is mounted on top of and inside the fuel tank. This pump is responsible for pushing fuel from the tank up to the engine's fuel rail and injectors. The fuel pump relay acts as the electrical switch that sends power to this pump when you turn the ignition key to the "ON" position or when the engine is cranking.

The Charger's fuel system is computer-controlled, and the Powertrain Control Module (PCM) manages when the relay is energized. When you turn the key to the "ON" position without starting the engine, you should hear a brief whirring sound coming from the rear of the vehicle—that is the fuel pump priming the system. If you don't hear that sound, the relay, a fuse, or the pump itself could be at fault.

It's also worth noting that the 2006 Charger with the "saddle" style gas tank uses two pumps: one electric pump on the driver's side and a siphon pump on the passenger side. The fuel pump relay controls the primary electric pump.

Where Exactly Is the Fuel Pump Relay Located?

The fuel pump relay on a 2006 Dodge Charger is not located inside the car or under the rear seat. It lives in the engine compartment. Here is the step-by-step process for finding it:

1. Open the hood and secure it properly.
2. Look to the driver's side of the engine bay. You will see a large black plastic box mounted directly behind or near the battery. This is the Totally Integrated Power Module (TIPM) or the front power distribution center.
3. Remove the cover of the TIPM. Press the release tabs on the sides of the cover and lift it straight off.
4. Look for the relay labeled "R4" . The underside of the fuse box cover typically has a diagram showing what each relay and fuse does. Relay R4 is the fuel pump relay.

Important note: Some sources indicate that the fuel pump relay is located in the engine compartment fuse box but do not specify the R4 label. However, the most detailed and specific information identifies it as relay R4 within the TIPM. Always cross-reference the diagram on the underside of the fuse box cover for your specific vehicle, as relay positions can vary depending on optional equipment and production date.

If you are looking for related components, the fuel pump itself is accessed by removing the rear seat cushion. There are two access panels under the rear seat: the electric pump is on the driver's side, and the siphon pump is on the passenger side. The fuel pump relay, however, is strictly in the engine bay.

Symptoms of a Failing Fuel Pump Relay

A faulty fuel pump relay can cause several noticeable problems. Recognizing these symptoms early can save you from being stranded. Here are the most common signs that your 2006 Dodge Charger's fuel pump relay may be failing:

1. Engine Cranks But Does Not Start

This is the most typical symptom. When you turn the key, the starter motor spins the engine over, but the engine will not fire up. This happens because the fuel pump is not receiving power, so no fuel reaches the injectors.

2. No Fuel Pump Priming Noise

When you turn the ignition to the "ON" position (without cranking the engine), you should hear a brief, high-pitched whirring sound from the rear of the car. This is the fuel pump priming. If you hear nothing, the relay may not be sending power to the pump.

3. Sudden Engine Stall

The engine may start and run fine, then die suddenly while you are driving. This is especially common if the relay has an intermittent internal connection. When the relay fails, the pump loses power, and the engine shuts off immediately.

4. Check Engine Light (CEL) Illumination

A failing relay can trigger diagnostic trouble codes (DTCs) related to the fuel pump circuit, such as P0231 or P0232. These codes indicate a low voltage condition in the fuel pump circuit.

If you experience any of these symptoms, the first thing to inspect is the relay and the associated fuse, as they are both easy to access and inexpensive to replace.

How to Test the Fuel Pump Relay

Testing the relay is a straightforward process that you can do at home with minimal tools. Here is a step-by-step guide:

Step 1: Locate and Remove the Relay
Open the TIPM as described above and locate relay R4. Gently pull the relay straight out of its socket. If it is tight, you can use a small flathead screwdriver to carefully pry it loose.

Step 2: Inspect the Relay Visually
Look closely at the relay pins and the plastic housing. Check for any signs of corrosion, melting, burn marks, or physical damage. If you see any of these, the relay is likely bad and should be replaced.

Step 3: Perform a Swap Test
This is the easiest and most effective test. The TIPM contains several identical relays (for example, the horn relay or the starter relay). Swap the fuel pump relay (R4) with a known-good relay from another circuit. If the engine starts after the swap, the original relay was defective, and you have confirmed the diagnosis.

Step 4: Use a Multimeter (Optional)
If you want to test the relay more precisely, set your multimeter to measure resistance. Check continuity between the relay's coil terminals (usually pins 85 and 86). A good relay should show a resistance reading between 50 and 120 ohms. Then apply 12V power to the coil terminals and listen for a click, which confirms the internal switch is working.

Step 5: Check the Fuse
While you have the TIPM cover off, check the fuel pump fuse. It is often labeled as Fuse 19 or similar within the TIPM. A blown fuse will also cut power to the pump and cause the same symptoms as a failed relay.

What to Do If the Relay Is Not the Problem

If the fuel pump relay tests good but the pump still does not operate, you need to look deeper into the fuel delivery system. Here are the common causes to investigate:

1. Blown Fuel Pump Fuse
If the fuse is blown, replace it with a new one of the same amperage. If the new fuse immediately blows, there is a short circuit somewhere in the wiring or the pump motor itself.

2. Failed Fuel Pump
The electric pump inside the fuel tank may have failed. You can test for voltage at the pump connector. The pump is accessed by removing the rear seat and the access panel on the driver's side of the saddle tank. If you have 12V at the connector but the pump does not run, the pump is defective.

3. Wiring or Connector Issues
Corroded, chafed, or broken wires between the TIPM and the fuel pump can interrupt the circuit. Inspect the wiring harness under the car and at the pump connector for damage.

4. TIPM Failure
The Totally Integrated Power Module itself is a known trouble spot on 2006-2008 Chargers. Internal failures in the TIPM can prevent the relay from receiving the signal to energize. This is a more serious issue and may require professional diagnosis or replacement of the TIPM.

Always start with the relay and the fuse, since they are easy to check and cheap to replace. If those are fine, the problem lies in the wiring, the pump, or the TIPM.

Replacing the Fuel Pump Relay

Replacing the fuel pump relay on your 2006 Dodge Charger is one of the easiest repairs you can do. You don't need any special tools, and the whole job takes less than five minutes.

1. Purchase a replacement relay. The genuine Mopar part number for the mini relay is 4727370AA. You can also use a standard automotive mini relay with the same pin configuration (typically 87, 87a, 30, 85, 86). Aftermarket relays are widely available at auto parts stores.
2. Open the TIPM and remove the cover.
3. Pull out the old relay (R4) straight from its socket.
4. Push the new relay firmly into the socket until it clicks into place.
5. Replace the TIPM cover and close the hood.
6. Test the system. Turn the ignition to the "ON" position and listen for the fuel pump priming sound from the rear of the car.

The cost of a replacement relay is minimal. A genuine Mopar relay is typically priced around $25 to $40. Aftermarket options are even more affordable.

Consider a High-Performance Fuel Pump Upgrade

If your fuel pump itself has failed, or you want to ensure your Charger delivers reliable fuel pressure for years to come, the pump itself can be replaced. While you have the fuel tank access panel open, it is a perfect time to upgrade to a high-quality aftermarket unit.

We recommend the KEMSO brand fuel pump for your Dodge Charger. KEMSO fuel pumps are known for their high performance, offering improved fuel flow and pressure compared to stock units. They are designed as direct OEM replacements, meaning they bolt in using the existing mounting hardware and connect to the factory wiring without modification. Each KEMSO pump is built with high-quality internal components to handle the demands of daily driving as well as high-performance applications, ensuring your engine gets the fuel it needs under all driving conditions.

Every KEMSO fuel pump comes with a lifetime warranty. This gives you peace of mind knowing that your investment is protected. If the pump ever fails, you can get a replacement without worrying about additional costs. With hundreds of five-star reviews from satisfied customers, KEMSO has earned a reputation as the #1 aftermarket fuel pump brand in the United States.

If you need a new fuel pump, whether for a repair or an upgrade, visit KEMSO's website to find the right one for your Dodge Charger. You can browse their full lineup of high-performance fuel pumps at https://www.kemsoracing.com/. Their product catalog covers a wide range of vehicles beyond the Charger, including motorcycles, ATVs, and other cars, all backed by the same lifetime warranty and commitment to quality. Take a look today and get back on the road with confidence, knowing your fuel system is in good hands.