Fuses in the passenger compartment and engine compartment (Focus Turnier 1)

Contents: On-board fuses are distributed among… ↳ You will determine the current… ↳

In your Focus, the on-board electrical equipment is protected from overload by numerous fuses. Their protective function is precisely calculated based on the theoretical maximum load of individual electrical circuits. Fuses immediately interrupt the current supply if, for example, in the event of a short circuit (faulty consumer, damaged wire), the on-board voltage is inconsistently diverted to ground. Thanks to this, they prevent other damage (e.g. ignition of wires) in your car. Your Focus is equipped with fuses with flat connectors, in which the fusible wire burns out in case of overload. However, the fact of fuse overload also occurs when an already fully loaded electrical circuit is burdened with additional consumers, such as high-quality sound reproduction equipment, amplifiers or unauthorized powerful unauthorized lights. Car vacuum cleaners and refrigerated boxes, which are simply plugged into the cigarette lighter socket, can also melt the fuse. Therefore, if necessary, equip your Focus with a separate electrical circuit for additional consumers, install the appropriate fuses. To avoid any possible failures, have this work done by a specialist in automotive electrical equipment, who will install wires with the required cross-section (minimum 1.5 mm²) and protect the socket accordingly.

On-board fuses are distributed among different electrical circuits

To prevent your Focus from being completely de-energized in the event of an electrical fault, Ford engineers have distributed electrical consumers across different electrical circuits. The engine management and most powerful units have their own protection. The so-called auxiliary consumers are combined into different groups and are switched on in each case via a fuse. This is not the case with the electrical circuits between the starter, battery, generator and ignition switch: they are constantly under full battery voltage. Therefore, special care is required when working on such electrical circuits: "ALWAYS" disconnect the battery first! Otherwise, major damage and ignition of the wires, up to and including a car fire, are simply programmed.

Focus brackets are fitted with so-called flat-terminal fuses. Two flat terminals are inserted into a transparent synthetic part and connected by a fusible wire. You will recognize a blown fuse by the broken fusible wire. Often the back of the plastic shell is also broken or melted.