Fuel Pump Safety Switch Wiring

Here s how to safely wire up an electric fuel pump using a common 40 amp iso no nc normally open normally closed relay for minimal voltage drop and an oil pressure safety switch for maximum.

Fuel pump safety switch wiring. Feed the relay with 10 gage wire and place it inside the car but close to the pump. This allows the fuel. However if you don t have a way to automatically shut off your electric fuel pump you will keep spraying raw fuel all over your hot engine and wiring. The safety interlock circuit stops the electric fuel pump when the engine stops even though the ignition switch is not turned off the pressure switch is a single pole double throw diaphragm actuated switch.

I did some research online and found a wiring schematic. So use a larger gauge wire for lower voltage drop. By using a wiring diagram for your car you should be able to find which wire is your ignition cable and determine the proper one to cut into. This heavy duty kit will provide a continuous supply of voltage to prevent drop off that is common with oe wiring which will protect your fuel pump from damage.

I m installing an electric fuel pump and want to include in my circuit a relay circuit breaker oil pressure safety switch. The low voltage will burn up the pump after a few weeks. Additionally this kit features an oil pressure safety switch to turn the fuel pump off in the. The diagram is color coded per circuit and only a few things may need to be said.

Also in a crash your pump can continue to run feeding a fire if you don t have a way to stop it. Without the relay you ll have about a 10 voltage drop at the pump with the long run of wire from ignition switch to safety switch to back of car. Below is an ignition kill switch wiring diagram. Make sure that your fuel pump is receiving full voltage from the battery with this kit.

Terminals p pump and i ignition are normally open. Fuel pump wiring for the red circuit is generally going to carry a much higher current than the relay. Terminals p pump and s start are normally closed. Basic safe electric fuel pump wiring diagram this is the basic wiring diagram for safe electric fuel pump wiring.