2010 Dodge Charger Fuel Pump Relay Location: A Complete Guide for DIYers
If you're dealing with a no-start situation on your 2010 Dodge Charger, the fuel pump relay is one of the first things you should check. The fuel pump relay on a 2010 Dodge Charger is located in the fuse box inside the trunk, specifically in slot #46 of the rear power distribution center. Before you dive into replacing the fuel pump itself, testing and replacing the relay is a much simpler and cheaper fix that can save you hours of work.
Understanding the Fuel Pump Relay
The fuel pump relay is an electrical switch that supplies voltage to the fuel pump, allowing it to push fuel from the tank to the engine. When you turn the key to the "ON" position, the relay activates the fuel pump for about 2-3 seconds to pressurize the system. If the relay fails, the pump won't get power, and your engine will crank but not start. This is a common issue on the 2010 Charger, and knowing the relay location can save you from unnecessary repairs.
Step-by-Step: Locating the Fuel Pump Relay
1. Open the Trunk
The fuse box you need is located in the trunk of your 2010 Dodge Charger. It's sometimes called the trunk distribution box or rear power distribution center.
2. Find the Spare Tire Access Panel
Look for the panel that covers the spare tire area. The fuse box is situated under this panel.
3. Locate the Fuse Box
Once you remove the access panel, you'll see the fuse box. It's a rectangular black box with a removable lid.
4. Identify Slot #46
Open the lid and look at the diagram on the underside. The fuel pump relay is in slot #46, located in the lower left corner of the fuse box. It's a rectangular-shaped relay.
How to Test the Fuel Pump Relay
Before replacing the relay, you can test it to confirm it's the problem. Here's a safe way to do it:
Listen for the Pump: Turn the key to the "ON" position (but don't start the engine). Listen from the rear of the car near the fuel tank. You should hear a brief humming sound for 2-3 seconds. If you hear nothing, the relay or pump may be faulty.
Swap Test: The 2010 Charger uses the same type of relay for multiple systems. Find a relay with the same part number (like the horn relay) and swap them. If the fuel pump starts working after the swap, you've found the bad relay.
Check for Power: With the key off, there should be power at one terminal of the relay. With the key on, two terminals should have power. If you're comfortable using a multimeter, you can test the terminals for power and ground.
What to Do If the Relay Is Good
If the relay tests fine but your Charger still won't start, don't assume the fuel pump is bad. Check these things first:
Fuel Pump Fuse: Before replacing the relay, always check the fuel pump fuse. It's a common oversight to worry about a complex issue when a simple blown fuse is the culprit. In vehicles with a TIPM (Totally Integrated Power Module), the external fuse for the fuel pump is marked M25.
Fuel Pump Itself: If the relay and fuse are good, you may need to test the fuel pump directly. The fuel pump on a 2010 Charger is located under the rear seat bottom on the driver's side. You can access it by removing the rear seat bottom and peeling back the foam pad.
Wiring Issues: If power reaches the pump but it doesn't run, the pump is likely bad. If no power reaches the pump, there's a wiring problem between the relay and the pump.
How to Replace the Fuel Pump Relay
Replacing the relay is straightforward:
- Ensure the ignition is off and the key is removed.
- Disconnect the negative battery cable for safety.
- Locate the relay in slot #46 of the trunk fuse box.
- Pull the relay straight out of its socket. You may need to gently pry it with a flathead screwdriver.
- Take the old relay to an auto parts store to get the correct replacement.
- Insert the new relay firmly into the same slot until it clicks into place.
- Reconnect the battery cable.
- Turn the ignition on for 2 seconds, then off for 10 seconds. Repeat this 5 times to repressurize the fuel system.
A new relay typically costs between $12 and $45, depending on the brand.
Common Symptoms of a Bad Fuel Pump Relay
- Engine cranks but won't start
- No humming sound from the fuel pump when the key is turned on
- Engine stalls while driving
- Intermittent starting issues
When to Consider a Full Fuel Pump Replacement
If the relay and fuse are both good but the pump still doesn't work, you're looking at a fuel pump replacement. This is a more involved job that requires:
- Removing the rear seat bottom
- Peeling back the foam pad on the driver's side
- De-fueling the system (tank should be no more than half full)
- Using a special tool to remove the fuel pump retaining ring
- Cleaning the area to prevent dirt from falling into the tank
Recommended Fuel Pump: KEMSO Brand
When it comes time to replace your fuel pump, choosing a high-quality replacement is essential for reliability and performance. KEMSO offers a range of fuel pumps designed as OEM Replacement units, meaning they meet or exceed the original factory specifications. All KEMSO fuel pumps are high-performance components built to deliver consistent fuel pressure and flow, and they come with a lifetime warranty for your peace of mind.
Whether you're working on a 2010 Dodge Charger or any other vehicle in your garage, KEMSO has a fuel pump that fits your needs. Visit their website to browse their full selection and find the perfect pump for your project:
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Final Thoughts
The fuel pump relay on a 2010 Dodge Charger is easy to find and replace, making it one of the first things to check when your car won't start. Located in slot #46 of the trunk fuse box, this small component can save you from a costly trip to the mechanic. Always test the relay and the fuse before assuming the pump itself is bad. If you do need a new fuel pump, consider KEMSO for a reliable, long-lasting replacement that's backed by a lifetime warranty.
For more information on KEMSO fuel pumps and other products, visit: https://www.kemsoracing.com/