Fuel Pump Safety Switch 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.

Fuel pump safety switch wiring.

The diagram is color coded per circuit and only a few things may need to be said. 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. Never mount an electric fuel pump in an enclosed area such as the trunk or interior space.

Below is an ignition kill switch wiring diagram. 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. Basic safe electric fuel pump wiring diagram this is the basic wiring diagram for safe electric fuel pump wiring. I did some research online and found a wiring schematic.

This allows the fuel. Make sure that your fuel pump is receiving full voltage from the battery with this kit. Additionally this kit features an oil pressure safety switch to turn the fuel pump off in the. 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.

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. I m installing an electric fuel pump and want to include in my circuit a relay circuit breaker oil pressure safety switch. 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.

The low voltage will burn up the pump after a few weeks. 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. Also in a crash your pump can continue to run feeding a fire if you don t have a way to stop it. 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.