Electrical equipment and appliances Ford Focus Turnier 1

Overview of wiring harnesses
Without the battery, starter, alternator and about 15 km of conductive cables in your Focus, almost NOTHING would work, at least coordinated: with an empty battery the...

General information about on-board electrical equipment
Electricity - «blood» engine management systems Your Focus, like any other car, depends on electricity to drive: its subsystems, such as engine management, fuel...

Basic concepts of electrical engineering
Electric current flows only through a closed electrical circuit. Electrical circuits consist of a current source (battery, generator), consumers (incandescent lamp,...

Voltage, current and resistance measurement
If you want to know if the various electrical consumers in your Focus are in order, then more than just an auto electrician can help you: there are a number of test...

Instruments and controls
Many technical components between the front and rear wheels of your Focus, as soon as you turn the ignition key, are «supervised» electronic nodes. This increases safety...

Checking Instruments in the Dashboard Self-Diagnostic Module
We assume that you belong to the mentioned pros or at least will relate to them. So, problems in the dashboard immediately catch your eye. In order to understand and...

Checking the function of the switches
Sometimes the power supply is interrupted just because of faulty switches. The Focus uses a wide variety of switch types. They are best checked with a test lamp - the...

Removing the combined instrument panel
The combined instrument panel in your Focus is a complex unit in which individual elements cannot be dismantled. It contains indicator devices and control lights of all...

Intertwined wire paths are not always traceable
Most current consumers in the Focus have double terminals. But often only one wire can be traced to the battery or alternator. The other ends at some body ground...

Fuses in the cabin and engine compartment
Numerous fuses protect the on-board electrical equipment in your Focus from overload. Their protective function is precisely calculated on the basis of the theoretical...

Fuses change quickly
You will find most of the fuses in the cabin on the left under the steering wheel, there are several relays there. The box with fuses and relays in the engine...

Switching relays distribute high operating currents
Your Focus has a number of loads that require higher operating currents than others. In order to achieve maximum safety there with the smallest possible conductor...

Location of fuses and relays
Central fuse and relay box (on the left under the dashboard) Fuse and relay box (on the left under the dashboard) Circuit breakers Number of amps Color Protected...