Fuses in passenger compartment and engine compartment

In the Fiesta, fuses are used to protect electrical circuits from overloads and short circuits. If additional electrical consumers are connected to the electrical circuit or a short circuit occurs due to a fault (which is nothing more than an excessively increased current flow), the electrical circuit is overloaded. If the current exceeds a certain allowable value, the fuses simply interrupt the flow of current. In this way, they prevent damage to the vehicle, such as wire fires. The Fiesta is equipped with flat fuses, in which, in the event of an overload, a fusible filament burns out. The fuse also performs its function when already fully loaded electrical networks are overloaded with additional consumers, for example, modern musical installations, speakers and unacceptably powerful lamps. Vacuum cleaners and refrigerators that you plug into your cigarette lighter can sometimes blow a fuse. If necessary, equip the vehicle with a separate electrical network for additional electrical equipment and install a fuse accordingly. To eliminate possible unpleasant consequences, contact an automotive electrician who will lay the necessary wires (with a cross section of at least 1.5 mm²) and install the necessary fuse.

Protection of various electrical circuits

To ensure that your car does not remain completely without electricity in the event of an electrical failure, Ford engineers have distributed consumers to various electrical circuits. Engine management and most powerful components have their own electrical circuit. Secondary consumers of electricity are collected in various electrical circuits, each of which is protected by its own fuse. Only the circuits connecting the starter, battery, alternator and ignition switch are not protected by fuses: there is always full battery voltage here.


WARNING

Take special care when working with electrical circuits: always disconnect the wires from the battery terminals first! Otherwise, serious damage and ignition of wires are inevitable, up to a fire in the car.



TECHNICAL DICTIONARY

Fuses used in the Fiesta

So-called flat fuses are inserted into the fuse holders. Two flat contacts are fused into a transparent plastic case, interconnected by a fusible conductor. You will recognize a blown fuse by a broken fusible conductor. Often the reverse side of the plastic case is damaged or melted.

Fuse color

On the reverse side of each fuse, the current value is indicated (A). The color of the fuse also corresponds to the value of the protected current.

Fuse color Current, A

Purple..............................3

Brown.................................7.5

Red........................................10

Blue..................................................15

Yellow...................................20

Transparent..................................25

Green........................................30