To a newbie the terms fuse and relay sound complex. It won’t take you long to figure out though that these two terms are not entirely complex. Note that when it comes to the Porsche fuse and relay, you do not have to understand how they work as an automotive expert does. You only need to understand basic fuse and relay circuitry. So how exactly do these two components work? Read on to learn more.
It is made of a small coil of wire woven around a central iron core. The iron core allows high current to pass through it as soon as the actuating switch powers up the coil. As simple as this concept sounds, it can control even high current devices.
Note that engineers use relays for very specific reasons. First off, certain automotive devices call for considerable amount of current (measured in amps). Such devices also require thick wires. The heavier the device the more current it will need. Unfortunately, setting up switches for these devices is expensive and sometimes ugly. It is because of this reason that engineers use relays. They are simple to use, they save energy and they are safe.
What It Powers
The starter solenoid is a good example of where the relay works best. That’s not the only device that makes use of relays though. Other devices that use relays include the power antenna, horns, compressor, air conditioning, engine cooling fans and power windows. Some Porsche models also use relays to power up accessory driving lights and the headlights.
Almost each device in your car is wired through a fuse. Think of them as safety features that can save the day should your car wiring end up with more current than it can handle. The fuse, which is designed to fail in the event of current overflow, will save the affect device as well as the surrounding devices. This goes a long way to prevent heating of the wires or subsequent melting of insulation. Remember that heated wires and melting insulation always results to fires. You can therefore imagine what would happen to a car without a fuse anytime there is a wiring glitch anywhere within the car.
How They Work
They are simple in design. All fuses have soft wires inside them with specific cross sectional thickness. The thickness varies depending on the amount of amps a fuse can handle before the wire melts. This is by itself a great safety feature. Simple, yet very effective. Too many amps and the fuse immediately fails.
Where They Are Located
Most Porsche models have the fuses located inside the fuse panel. However, some are in-line. In-line fuses simply mean that the fuses can be found under the dash or in the engine compartment. There are also what automotive exerts refer to as fusible links. Like most in-line fuses, they are often found inside the wiring harness inside the engine compartment. They use the same concept as other fuses. They are also molded and have single purpose links which are designed to melt under extreme conditions.