![]() If you use a vehicle’s stock wiring and switches to control aftermarket devices like high-output lighting, relays will not overload or stress the OEM components.Relays allow you to use the proper size fusefor each device, and to place the fuses closer to the battery.If you’re into clean-looking systems, you can use one switch and several relays instead of a bank of bulky switches. Having only one switch to turn off is safer in an emergency, and more convenient as well. Using relays allows you to control a number of devices with a single switch (a master ignition switch on a race car, for example).Combined with the proper gauge wire, this will minimize the voltage drop between the battery and the device, allowing it to function at peak performance levels. shortest wire length) between the batteryand the device(s) controlled by the relay. A correctly wired relay will provide the shortest electrical path (i.e.Why not just use an ordinary on/off switch, you ask? Here are some reasons why relays are better than switches: You can read our earlier post on How Relays Workfor a more detail description of how relays operate. ![]() An electro-magnet (also called a coil) is used to pull a set of contacts, or pins, together. One easy way to increase system reliability and performance is by using relaysto switch devices (lights, fuel pumps, fans, etc.) on and off. ![]() An electrical systemis only as reliable as its components.
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