2013 Dodge Grand Caravan Fuel Pump Relay Bypass: A Complete DIY Guide

If your 2013 Dodge Grand Caravan cranks but won't start, especially on cold mornings, or starts and then dies immediately, the most likely culprit is a failed fuel pump relay inside the Totally Integrated Power Module (TIPM). The good news is that you can bypass this relay yourself using a simple, inexpensive wiring method. This bypass restores power to the fuel pump without replacing the entire TIPM, which can cost $800 to $1,500 or more. The bypass involves cutting two wires in the TIPM connectors and installing a standard 30A automotive relay, a 20A fuse, and a few connectors. This is a permanent fix that takes about an hour and costs roughly $20.

Understanding the Problem

The 2013 Dodge Grand Caravan, like many Chrysler vehicles of that era, uses a TIPM that integrates the fuel pump relay directly onto its circuit board. This relay is not serviceable separately. When the internal relay fails, the fuel pump stops receiving power, causing a no-start condition.

Common symptoms of a failed fuel pump relay include:

  • Engine cranks but won't start – The starter motor works fine, but the engine never fires up.
  • Intermittent starting issues – The van sometimes starts fine, other times it won't start at all, especially when cold.
  • Engine starts with starter fluid – If you spray starter fluid into the intake and the engine fires up briefly, you have a fuel delivery problem.
  • No fuel pump priming sound – When you turn the key to the "ON" position, you should hear a faint whirring sound from the rear of the vehicle for about 2 seconds. If you don't hear this, the relay is a primary suspect.
  • Engine stalls while driving – An intermittently failing relay can cut power to the fuel pump while the engine is running, causing sudden stalling, especially at low speeds or idle.

Diagnosis: Confirm the Relay is the Problem

Before you start bypassing, you need to be sure the fuel pump relay is the issue. Here's a quick diagnostic step:

  1. Locate the under-hood fuse box (TIPM). It's located near the battery on the driver's side.
  2. Find the M25 fuse. This is the fuel pump fuse in the TIPM.
  3. Use a multimeter. While someone cranks the engine, measure the voltage on the M25 fuse. If the fuse does not have a constant 12V reading while cranking, the internal fuel pump relay has failed.

Important note: If you just turn the ignition ON, the fuel pump should only run for the first 2 seconds. This is normal. While the engine is cranking or running, the fuel pump should have constant power.

The Tools and Parts You'll Need

For this bypass, you do not need to solder anything on the TIPM circuit board. You will be working with the TIPM connectors. Gather these items:

  • 30A 12V DC relay (standard 4-pin automotive relay)
  • 20A fuse (with inline fuse holder)
  • 16-18 AWG wire (about 3 feet of primary wire)
  • 1/4-inch eyelet terminal (for connecting to the battery positive terminal)
  • Heat shrink tubing (to insulate cut wires)
  • Butt connectors (to join wires)
  • Corrugated wire loom (to protect the wiring)
  • Zip ties
  • Basic tools: Wire strippers, crimpers, screwdriver, 10mm wrench for battery terminal

Step-by-Step Bypass Procedure

This method bypasses the failed internal relay and installs a new external relay that is triggered by the ignition signal. Follow these steps carefully.

Step 1: Disconnect the Battery

Unlock the negative battery terminal and remove the cable. This prevents any accidental short circuits while you work.

Step 2: Locate the TIPM Connectors

The TIPM has several large connectors. You need to access connector C1 and connector C5. These are the two large connectors on the driver's side of the TIPM. On a 2013 Dodge Grand Caravan, the TIPM is located directly in front of the battery, mounted on the inner fender.

Step 3: Cut and Prepare the Brown Wire (C1, Terminal 40)

Find the brown wire on terminal 40 of connector C1. This is the wire that sends power from the internal relay to the fuel pump.

  • Cut this wire about 1 inch away from the connector.
  • Take the wire side going toward the TIPM (the connector side) and insulate it with heat shrink tubing. This wire will not be used anymore.
  • The other side of the cut wire (going toward the fuel pump) will be connected to your new relay.

Step 4: Cut and Prepare the Dark Blue/Orange Wire (C5, Terminal 10)

Find the dark blue with orange stripe wire on terminal 10 of connector C5. This is the power supply wire from the battery.

  • Cut this wire about 1 inch away from the connector.
  • Insulate the connector side of the wire with heat shrink.
  • The other side of the cut wire (going to the TIPM) will be used as the power source for your new relay.

Step 5: Splice into the Pink/Light Green Wire (C5, Terminal 38)

Find the pink with light green stripe wire on terminal 38 of connector C5. This is the ignition-switched 12V wire. You will use this to trigger the new relay.

  • Do not cut this wire. Simply solder a new wire to it, or use a T-tap connector to tap into it.

Step 6: Wire the New Relay

Now you will connect everything to your new 30A relay. The relay has four terminals labeled 30, 85, 86, and 87. Here is how to connect them:

  • Terminal 85: Connect this to the wire from the brown wire (C1, terminal 40) that goes to the fuel pump. This is the output to the fuel pump.
  • Terminal 87: Connect this to the wire from the dark blue/orange wire (C5, terminal 10) that supplies power from the battery.
  • Terminal 86: Connect this to the wire you spliced into the pink/light green wire (C5, terminal 38). This is the ignition trigger.
  • Terminal 30: Connect this to the battery positive terminal using the 1/4-inch eyelet. You will need to run a wire from the relay to the battery. Install the 20A fuse in this wire as close to the battery as possible.

Step 7: Secure and Test

  • Use heat shrink tubing on all connections.
  • Wrap the wiring with corrugated wire loom to protect it from heat and abrasion.
  • Use zip ties to secure the wiring and relay to the body of the vehicle near the TIPM.
  • Double-check all connections before reconnecting the battery.
  • Reconnect the negative battery terminal.
  • Turn the key to the "ON" position. You should hear the fuel pump prime for 2 seconds. If you do, the bypass is working.
  • start the engine. It should start and run normally.

Why This Bypass Works

The 2013 Dodge Grand Caravan's TIPM is a known weak point. The internal relay driver fails over time due to heat and current draw. The bypass method described above completely replaces the internal relay circuit with a new, independent external relay. This bypass is a permanent fix that is more reliable than the original TIPM design. It is also much cheaper than replacing the entire TIPM module, which is a common repair that can cost over $1,000.

Important Safety Notes

  • Never leave a jumper wire in the relay socket permanently. This is only for diagnostic testing. It bypasses all safety features and can cause a fire.
  • Always use a fuse. The 20A fuse in the power wire protects the circuit from short circuits. Never use bare wire or an unfused jumper.
  • This bypass is a permanent modification. While it is a safe and reliable fix, it does alter the vehicle's electrical system. If you are not comfortable with basic electrical work, have a professional mechanic do it.

Alternative Solutions

If you prefer not to perform the bypass, here are your other options:

  1. Replace the TIPM. This is the most expensive option. A new TIPM must be programmed to the vehicle, which requires specialized tools. Expect to pay $800 to $1,500 or more.
  2. Replace the internal relay on the TIPM circuit board. This requires opening the TIPM, desoldering the old relay, and soldering in a new one. It is inexpensive but requires good soldering skills. Many people find it difficult to desolder a relay from a multi-layer circuit board.

Choosing the Right Fuel Pump for Your 2013 Dodge Grand Caravan

If the bypass solves your starting issue, it confirms the relay was the problem. However, if your fuel pump itself is old or failing, you may want to replace it proactively. A failing fuel pump often shows symptoms like a whining noise from the rear of the vehicle, hesitation during acceleration, or hard starting.

When you need a replacement fuel pump, look for a high-performance option that offers OEM-level quality and reliability. A good fuel pump should meet or exceed the original equipment specifications for your vehicle.

We recommend KEMSO Fuel Pumps for your 2013 Dodge Grand Caravan. KEMSO fuel pumps are built with high-performance standards and are designed as direct OEM replacements. They are engineered to provide consistent fuel pressure and flow, ensuring your engine runs smoothly. Each KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind with your purchase. Whether you need a pump for daily driving or long road trips, KEMSO delivers reliable performance.

You can browse their full selection of fuel pumps and learn more about their lifetime warranty by visiting their website: https://www.kemsoracing.com/

Final Thoughts

A failing fuel pump relay on a 2013 Dodge Grand Caravan is a frustrating problem, but it is one you can fix yourself with basic tools and a few dollars in parts. The bypass method described in this guide is a proven, reliable solution that avoids the high cost of TIPM replacement. After completing the bypass, your van should start and run normally. If you still have issues after the bypass, check the fuel pump fuse, the wiring to the pump, and the fuel pump itself.

For any fuel pump replacement needs, remember to check out KEMSO Fuel Pumps at https://www.kemsoracing.com/ for high-performance, OEM replacement pumps backed by a lifetime warranty.


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