How to Replace a Fuel Pump Relay

Your car needs a fuel pump relay so that your vehicle can start up. The fuel pump relay works by pressurizing the fuel system so that the oil pressure’s level rises to start the car. In fact, a damaged fuel pump relay means that the fuel system has no capability to build pressure to be able to send gas to the car’s engine thus preventing the car to start properly. If you encounter this problem, then this simply means that your fuel pump relay needs to be replaced. Now while this particular task requires a good skill in auto mechanics, you can still do this task on your own by following these steps. For this DIY task, you will be needing the following materials:

  • Car manual
  • Flat screw driver
  • Working gloves
  • Fuel pump relay replacement

Step 1 - Disconnect The Car’s Battery

Before you begin looking for the fuel pump relay, it is important that you disconnect your car’s battery first for safety reasons. Once done, you can start looking for the fuel pump relay which is usually found inside the fuse box located in the engine compartment. However, the exact location of the fuel pump relay is not always located in a standard location and each location depends on the model of the car thus it is always important that you have the manual of the car if possible.

Step 2 - Remove The Pump

The fuel pump relay is a cube-shaped object found inside the engine compartment. Once you spot the fuel pump relay, remove it carefully by removing the prongs that looks like electrical plug using a flat screw driver. For safety precaution, wear a pair of working gloves in order to remove the fuel pump relay.

Step 3 - Replace The Fuel Pump Relay

Once the fuel pump relay has been removed properly, replace it with a new one which you can get from an auto supply store for about $12 to $45 depending on the brand. If you have been having a lot of trouble with your previous fuel pump relay, then why not choose another brand. You can ask the specialist from the store to recommend a better brand but this will surely cost you more money than what you have spent for previously. When replacing the fuel pump relay, make sure that you reconnect the cables and other plug-ins as well as other connectors. Make sure that the fuel pump relay is securely held in place before you reconnect everything, including the battery cables.

Step 4 - Test The New Fuel Pump Relay

Once everything is connected, test the fuel system by increasing its pressure. The thing here is that the fuel pump relay has been depressurized after you have replaced it with a new one. Before you test it, make sure that the gas cap is held securely before you turn on the ignition for two seconds and shut it off for about 10 seconds before you start the ignition again. Repeat the process five times until the car starts properly.