Fuel Pump Relays - Allows Current Through To The Fuel Pump
Fuel Pump Relays – Allows Current Through To The Fuel Pump

Choose Your Fuel Pump Relays Help Topic Below

Fuel Pump Relay – Function And Testing Procedures


Fuel Pump Relays – Allows Current Through To The Fuel Pump

So, When you turn the ignition on; the fuel pump relay will supply a consistent voltage to the fuel pump. Therefore, problems with the fuel pump relay; will result in the fuel pump malfunction. A bad or failing fuel pump relay; will often show symptoms to tell the driver something is wrong.

So, What are They?

So, fuel pump relays are necessary component; for the combustion engine model to function. The combustion engine needs fuel to run; and the fuel pump relay ensures that the engine gets what it needs. The power control module (PCM) or ignition; usually controls the fuel pump relay. When you turn on the ignition; the fuel pump relay powers up the fuel pump. When you shut off the ignition; the fuel pump relay powers down the fuel pump.

Common Locations

So, The fuel pump relay is usually located in one of the fuse boxes. Basically a long black box which contains fuel pump relay; along with various other fuses and relays.

Basic Functions

When you turn the key in the ignition to start your car; the “start cycle” of the engine begins. So, by turning on the ignition; the fuel pump relay powers up the fuel pump. The key here, is to produce a small amount of voltage; but consistently to the fuel pump. Once the engine is running, the fuel pump relay shuts off. Consequently, the electricity for the fuel pump is now; supplied by the oil pressure sending unit. When you shut off the ignition the fuel pump relay is; disengaged and shuts off the fuel pump.

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