1434
Relays
A relay is effectively an electromagnetic switch. To close the relay contacts and complete
the circuit, an electromagnet in the relay is energised which causes the relay contacts to
close, making the circuit complete.
Relays are used when the electrical current is too great for a mechanical switch, usually
when the switching must be done quickly to prevent arcing across the switch contacts. If
a mechanical switch were used, the mechanical switch contacts would quickly burn away.
Relays Connected with a Single Socket Connector
The illustration above shows an example of a relay connected to the wiring harness with
a single socket relay connector.
A pin diagram of a typical single socket relay connector is shown below.
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