Electrical equipment and appliances Ford Focus Turnier 1

Wiring Harness Overview
Without a battery, starter, alternator, and about 15 km of current-carrying cables, almost NOTHING in your Focus would work, at least in a coordinated manner: with an...

General information about on-board electrical equipment
Electric power is the "blood" of the engine management system Your Focus, like any other car, relies on electricity to drive: its subsystems, such as engine management,...

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

Measuring voltage, current and resistance
If you want to know whether the various electrical consumers in your Focus are in order, then not only an auto electrician can help you: in specialized stores there are...

Instruments and controls
Many of the technical components between the front and rear wheels of your Focus are "watched" by electronic units as soon as you turn the ignition key. This increases...

Checking the instruments in the instrument panel self-diagnostic module
We assume that you are one of those professionals, or at least will be one. So, you immediately notice problems in the instrument cluster. To understand and classify...

Checking the operation of switches
Sometimes the power supply is interrupted simply because of faulty switches. The Focus uses a variety of switch types. It is best to check them with a test lamp - the...

Dismantling the combination instrument
The instrument cluster in your Focus is a complex unit in which individual elements cannot be removed. It contains indicator instruments and control lights for all...

Intertwined wire paths are not always traceable
Most Focus consumers have dual terminals. But often you can only trace one wire to the battery or alternator. The other terminates at some body ground, engine ground,...

Fuses in the passenger compartment and engine compartment
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...

Fuses are replaced quickly
Most of the fuses are located in the passenger compartment on the left under the steering wheel, where several relays are located. The fuse box and relay in the engine...

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

Location of fuses and relays
Central fuse and relay box (left under the dashboard) Fuse and relay box (left under the dashboard) Fuses Number of amps Color Protected electrical circuits 30 7,5 brown...