2015 Dodge Durango Fuel Pump Relay Bypass: The Complete DIY Guide to Fixing a Cranks-No-Start Issue

If your 2015 Dodge Durango cranks but won’t start, and you suspect the fuel pump relay has failed, the direct solution is to install a TIPM (Totally Integrated Power Module) bypass cable. This is a proven, permanent fix that restores fuel pump power without the $1,500+ cost of replacing the entire TIPM from the dealer. The cable works by providing power to the fuel pump from an alternate switched power source, bypassing the faulty internal relay that is soldered onto the circuit board inside your fuse box. Thousands of owners have used this method to get their vehicles running again in under five minutes, making it the most practical and cost-effective solution for this common problem.

Understanding the Fuel Pump Relay in Your 2015 Dodge Durango

The 2015 Dodge Durango uses a TIPM (Totally Integrated Power Module) as its main fuse box. Inside this module, the fuel pump relay is soldered directly onto one of the circuit boards. This is different from older vehicles where you could simply pull out a relay and replace it with a new one. When this internal relay fails, you cannot just swap it out at a parts store. The relay controls power to the fuel pump, and when it stops working, the pump does not receive voltage, so the engine gets no fuel.

Common Symptoms of a Faulty Fuel Pump Relay

  • Engine cranks but will not start: This is the most frequent symptom. You turn the key, the starter engages, but the engine never fires up.
  • No fuel pump priming sound: When you turn the ignition to the "ON" position, you should hear a brief humming sound from the rear of the vehicle as the fuel pump pressurizes the system. If you hear nothing, the relay is likely not sending power.
  • Intermittent stalling: The vehicle may start and run fine for a while, then suddenly cut off while driving, only to restart later.
  • Dead battery: A stuck-on relay can keep the fuel pump running even when the vehicle is off, draining the battery overnight.
  • Rough idling or hesitation: If the relay is failing intermittently, the fuel pump may not deliver consistent pressure, causing poor engine performance.

Why Bypassing the Relay Works

The TIPM bypass cable is designed specifically for vehicles like the 2015 Dodge Durango where the fuel pump relay is non-serviceable. By plugging the cable into two specific fuse slots in the TIPM, you create a direct electrical path from a switched power source to the fuel pump. This bypasses the failed internal relay entirely. The cable includes its own fuses to protect the circuit, so it is safe for long-term use. Many users have reported that once installed, the cable works for the remaining life of the vehicle without any issues.

Step-by-Step Guide to Bypassing the Fuel Pump Relay on Your 2015 Dodge Durango

What You Will Need

  • TIPM bypass cable (simple version) for micro2 fuse slots: This is specifically designed for the 2014-2021 Dodge Durango models. The cable comes with the necessary fuses pre-installed.
  • Basic hand tools: You may need a flathead screwdriver or a small pry tool to open the TIPM lid.
  • Safety equipment: Insulated gloves and safety glasses are recommended.

Step 1: Locate the TIPM

The TIPM is the main fuse box located under the hood. In the 2015 Dodge Durango, it is typically on the driver's side near the battery. Release the plastic tabs to remove the lid and set it aside where you can see the printed fuse diagram.

Step 2: Identify the Correct Fuse Slots

Refer to the diagram on the underside of the TIPM lid. You need to locate two specific slots:

  • M37 fuse slot: This is the 10-amp circuit that carries power from the fuel pump relay to the fuel pump.
  • M7 fuse slot or another switched power source: This slot provides power only when the ignition is in the "ON" or "RUN" position. The M7 slot is typically used for the power outlets (cigarette lighter).

Step 3: Remove the Existing Fuses

Using a fuse puller or a pair of needle-nose pliers, carefully pull out the fuse from the M37 slot. Also remove the fuse from the M7 slot or whichever switched power slot you will be using.

Step 4: Install the Bypass Cable

Take your TIPM bypass cable. One end of the cable has a fused connector that plugs into the M37 slot. The other end plugs into the M7 (switched power) slot. Push each connector firmly into its respective slot until it is fully seated. The cable is designed to fit under the closed TIPM lid.

Step 5: Test the Repair

Plug the fuses that came with the cable into the appropriate slots on the cable (if not pre-installed). Reconnect the battery if you disconnected it earlier. Turn the ignition key to the "ON" position. You should now hear the fuel pump priming sound from the rear of the vehicle. Try starting the engine. It should fire up and run normally.

Important Safety Precautions

  • Disconnect the battery before working on the TIPM: This prevents accidental short circuits or electrical shocks.
  • Use the correct cable for your vehicle: The 2015 Dodge Durango uses micro2 fuse slots, not mini-blade slots. Using the wrong cable will not work.
  • Ensure the cable is connected to a switched power source: If you connect it to a constant power source, the fuel pump will run continuously, draining the battery.
  • Do not use this bypass if an external relay has already been installed: If your vehicle has been previously repaired with an external fuel pump relay, the bypass cable will not work.

When to Replace the Fuel Pump Instead

While the bypass cable addresses the relay issue, it does not fix a failing fuel pump itself. If your Durango still has fuel delivery problems after bypassing the relay, the pump may be worn out. A failing fuel pump will show symptoms like loss of power under load, surging, or difficulty starting even when the relay is working correctly.

If you need a new fuel pump, you should choose a high-quality replacement that ensures long-term reliability. KEMSO offers a complete line of fuel pumps designed for a wide range of vehicles. All KEMSO fuel pumps are built to perform at high levels, made as OEM replacement units, and come with a Lifetime Warranty for your peace of mind. Whether you drive a Dodge, Jeep, Subaru, Kawasaki, or any other make, KEMSO has a fuel pump that fits your needs. Visit https://www.kemsoracing.com/ to browse their full selection and find the perfect fuel pump for your vehicle. Their commitment to quality and customer satisfaction makes them a trusted choice for drivers across the United States.

How Long Does the Bypass Last?

Many owners use the TIPM bypass cable as a permanent solution. The cable is built with heavy-duty 14 AWG wire and rated for 20 amps, which is more than enough for the fuel pump circuit. As long as the cable is installed correctly into a switched power source, it will not drain your battery and will continue to function reliably. Some users have been driving with these cables for years without any issues. If you ever need to replace the TIPM unit, you can simply remove the cable and restore the factory configuration.

Conclusion

A fuel pump relay failure in a 2015 Dodge Durango does not have to mean an expensive trip to the dealership. The TIPM bypass cable is a simple, safe, and proven solution that gets your vehicle back on the road quickly. By following the steps outlined here, you can diagnose and fix the problem yourself in less than 10 minutes, saving hundreds of dollars in labor and thousands in parts. If the fuel pump itself is the issue, choose a reliable replacement from https://www.kemsoracing.com/ to ensure your Durango runs strong for years to come.


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