Troubleshooting Your Car’s Fuel Pump Fuse: 3 Common Causes

You drive around your car and suddenly your car starts sputtering. You notice that the gas gauge is low but it has been filled just a few minutes ago. Is this happening more than once without any rhyme or reason?

There may be a solution to your fuel pump fuse blowing. This can cause problems later, such as getting stuck somewhere. We will be discussing 3 reasons that blown fuses in cars are the most likely cause of fuel pump fuse failure and how to fix them if they are caught early. Why is my fuel pump fuse constantly blowing?

These are the top 3 reasons why a fuel pump fuse keeps blowing:

  1. A damaged fuel pump fuse, or bad wiring, can lead to the fuse blowing.
  2. Particles from water can build up on parts of your gas tank making them less efficient. This applies to parts of your electrical system, such as resistors and sensors that are susceptible.
  3. If not properly polarized, gasoline engines can produce sparks that cause ignition. This could cause damage to some electronic components.

How can you fix a fuse that keeps blowing up?

Many drivers have problems with fuel pump fuses. These are the steps to take if your fuel pump fuse keeps blowing.

All fuses should be checked for damage and loose connections. Check to see if the fuse has been replaced.

Verify that there is no corrosion on the wires. You can clean any corrosion with a wire brush, and then apply dielectric oil to lubricate it. Use dielectric grease to seal connectors against dirt and moisture.

Fuel pump problems can also be caused by grounding issues! You should inspect your vehicle’s grounding system, and make repairs if necessary. The fuse can also blow if there is a loose ground wire or dirty ground connector.

If your problems persist, you can have your fuel system checked for any leaks . The fuel filter should be replaced if necessary. If all else fails we recommend that you have your car’s computer system scanned.

Check for sparks and polarity indicators to ensure that all electrical components have the correct polarization.

Why does my fuel pump relay keep going bad?

The fuel pump relay controls the fuel pump’s current. If the fuel pump is not working properly, your car may stop running or run poorly.

The relay’s output closes the contact with the load when the fuel pump’s relay receives a continuous power supply. If the pressure sensor detects that there is no fuel in its return trip, it causes the engine’s to cut out.

How do you know if the plug fuse has blown?

It’s easy to check if a fuse has blown. You just need to unplug the fuse and then use a multimeter to place one end of the meter on each side of the wire.

You should also use the other end of your meter for each terminal. One terminal will give off a reading depending on its size. If the meter shows anything but zero ohms it is likely that it has detected an active circuit. It may be worth replacing the outlet with one that is newer.

Is a blown fuse capable of igniting a fire?

A blown fuse can cause a fire. Moisture in wiring can cause oxidation, which can lead to the combustion of wire insulation and overheating. The growth of mold and bacteria in damp walls can cause a buildup of powdery deposits within fuses that may result in short-circuiting or even arcing.

If a blown fuse is found in the engine compartment, it can start overheating and cause a fire. Because of its potential for causing a fire, a blown fuse in the engine compartment should be removed immediately.

Are you looking for signs that your fuel pump needs to be replaced?

  1. Loss of power, sputtering, or engine struggling to start.
  2. The car is not performing well and there is no progress, despite the fact that gas was used.
  3. When you rev the engine up, your car will start to spit and sputter.

If it blows constantly, do I need a larger fuse?

It is simple: NO! The chance of it blowing again is greater when you replace the fuel pump fuse. You must ensure that the fuse you choose will be able to carry the required current for your vehicle. When choosing a replacement fuse, there are two things you should consider: gauge and voltage.

A 10-amp fuse for your car or truck might be around 20 gauge wire with a voltage rating between 125 and 125 volts. A 25-amp fuse means choosing a 20 gauge wire with a voltage rating 250 volts. You could cause more damage to your vehicle if you choose a gauge that is too heavy, such as 10 or 12.


There are many reasons your fuel pump fuse keeps blowing. Most common causes are corrosion on the electrical wires and grounding issues. It is important to get your problem checked out by a mechanic immediately if you notice any of the above symptoms.


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