Ford relays

Last Updated on July 23, 2024 by Mutiara

Relays are meant to control electrical current flow. An electromagnet operates the relay with minimal draw through the switch. Relays are used in fuel injection to make computers cheaper and more reliable. The main computer has many jobs to do and can not do them alone. The computer sends small amounts of electricity to the relays which then control the high demand devices. Below are the internal workings of a basic relay.

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Ford relay diagram1.png Ford relay diagram2.png

There are a few specialized relays out there. Here are a few different examples of relays. Most people buy the universal Bosch 30amp change-over relay.

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Inertia fuel cut-off switch

This relay plays a crucial role in the safety of the driver and vehicle during collision. It does this by disabling the fuel pump to prevent fire when a pedetermined force is applied. Just like a circuit breaker the red button pops up when it is tripped. It consists of a steel ball held in place by a magnet. When a sharp impact occurs, the ball breaks loose from the magnet, rolls up and strikes a target which opens the electrical contacts of the switch and shuts off the electric fuel pump. It must be mounted straight up to work correctly. On some vehicles a fuel reset light will illuminate on the dash.

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