Fuel Pump Safety Switch Wiring

Terminals p pump and s start are normally closed.

Fuel pump safety switch wiring.

The low voltage will burn up the pump after a few weeks. 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. 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. Once the wire is cut you can either solder the 2 ends of the wire into the switch or use additional connectors and crimp it on no soldering required.

I did some research online and found a wiring schematic. This allows the fuel. The diagram is color coded per circuit and only a few things may need to be said. 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.

Terminals p pump and i ignition are normally open. 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. Also in a crash your pump can continue to run feeding a fire if you don t have a way to stop it. 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.

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. Make sure that your fuel pump is receiving full voltage from the battery with this kit. Basic safe electric fuel pump wiring diagram this is the basic wiring diagram for safe electric fuel pump wiring. Additionally this kit features an oil pressure safety switch to turn the fuel pump off in the.

Below is an ignition kill switch wiring diagram. I m installing an electric fuel pump and want to include in my circuit a relay circuit breaker oil pressure safety switch. Feed the relay with 10 gage wire and place it inside the car but close to the pump. So use a larger gauge wire for lower voltage drop.