Electrical equipment and devices of the car Audi A4 B6, gasoline

Vehicle electrical system — general information
The car needs power even when parked, not to mention moving. Energy is needed to drive the engine and inject gasoline. Without electrical energy, all other,...

Basic concepts of electrical engineering
Electricity can only flow in a closed circuit. An electrical circuit consists of a current source (e.g. battery), consumers (e.g. incandescent bulbs, starter)...

Voltage, current and resistance measurement
It is not necessary to call an electrician if you want to make sure that the various electrical systems in your car are working. Trade offers a range of...

On-board electrical equipment — general information
Most of the measuring points in the vehicle are controlled by electronic components. This makes the driver's job easier, since he only has to keep track of a...

Checking instruments and signaling devices before driving
Before you start driving, take a look at the instrument panel. The number of indicators on the panel depends on the equipment of the model. However, some...

Checking the function of the switches
Switches of various types actuate individual consumers either directly or via relays. Sometimes a defective switch leads to a malfunction of an electrical...

Dismantling and installation of the light switch
1. Dismantling: Pressing the light switch (arrow 1), turn it to the right (arrow 2). Click on the light switch and turn it to the right 2. While holding the...

Headlight range control
1. Dismantling: Remove the light switch as described above. 2. Through the mounting hole of the light switch, grasp the headlight range adjuster and push it...

Switch in center console
This console, located under the middle air outlets in the Audi A4, houses several switches, including one for the hazard warning lights. All of them are...

Glove box light switch
A special tool is also required for the correct dismantling of this circuit breaker: the 3370 front end hook. 1. Dismantling: Open the storage box. Using...

Switch to change the position of the mirror
1. Dismantling: Remove the front door trim (see chapter « Salon »). 2. Disconnect connector 2 on the switch for mirror adjustment 1. Switch for changing the...

Power window switch, driver's side
1. Dismantling: Remove the front door trim (see chapter « Salon »). 2. Use a small screwdriver to carefully release the locking hooks (arrows). 3. Pull the...

Power window switch, passenger side
1. Dismantling: Remove the front door trim (see chapter « Salon »). 2. Use a small screwdriver to carefully release the locking hooks (arrows). 3. Pull the...

Switch of the centralized door locking system
1. Removal: Remove the driver's door trim (see chapter « Salon »). 2. Disconnect connector 2. Central door lock switch 3. Press switch 1 out of the driver's...

Pushbutton for interior burglar alarm
1. Removal: Remove the driver's door trim (see chapter « Salon »), The push button for the alarm and towing protection is located in the door pocket. 2....

Rear door contact switch
1. Dismantling: Dismantle the rear door lock (see chapter « Body »). 2. Use a flat screwdriver to unfasten the plastic cover 3 from the locking pins 1. 3. Fold...

Removing and installing the combined instrument panel
Apart from the removal of the steering wheel, the removal and installation of the combined instrument panel is relatively easy. However, it is better not to...

Multi-pin connectors
A lot of wire connections should not interfere with the work with structural elements. In order to access or remove parts, it is often necessary to disconnect...

Switching relays — description
Each car has a number of consumers that, compared to others, consume a large current. They are not activated directly via a switch, but via switching relays....

Distribution of fuses in circuits
Directly on the battery is the 150 A main fuse. Most of the fuses for individual consumers and electrical circuits are located in the fuse box on the left side...

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A4(B6, 2000-2006)

A4(B6, 2000-2006, petrol)

A4(B5, 1994-2001)

A4(B5, 1994-2001, petrol)