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

Car electrical system — general information
A car needs electricity even when it is parked, let alone when it is moving. Energy is needed to control the engine and inject gasoline. Without electricity,...

Basic concepts of electrical engineering
Electric current can only flow in a closed circuit. An electric circuit consists of a current source (for example battery), consumers (for example,...

Measuring voltage, current and resistance
If you want to make sure that the various electrical systems of the car are in order, it is not necessary to call an electrician. The trade offers a whole...

On-board electrical equipment instruments — general information
Most of the measuring points in the car are controlled by electronic design elements. This makes the driver's job easier, since he only has to monitor a few...

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

Checking the operation of switches
Switches of various types activate individual consumers either directly or via a relay. Sometimes a switch defect causes a malfunction of a particular...

Removal and installation a light switch
1. Removal: While pressing the light switch (arrow 1), turn it to the right (arrow 2). Press the light switch and turn it to the right 2. While holding the...

Headlight leveling regulator
1. Dismantling: Remove the light switch as described above. 2. Through the mounting hole of the light switch, grasp the headlight leveling adjuster and press...

Switch in the center console
This console, which is located under the middle air outlets in the Audi A4, contains several switches, including those for the hazard warning lights. They are...

Glove compartment light switch
To properly remove this switch, you will also need a special tool: the 3370 front hook. 1. Removal: Open the glove compartment. Using special tool 3370, remove...

Switch for changing the position of the mirror
1. Removal: Remove the front door trim (see chapter " Salon "). 2. Disconnect connector 2 on the switch to adjust the position of mirror 1. Switch for changing...

Driver's side window switch
1. Removal: Remove the front door trim (see chapter " Salon "). 2. Using a small screwdriver, carefully release the locking hooks (arrows). 3. Pull the switch...

Front passenger side window switch
1. Removal: Remove the front door trim (see chapter " Salon "). 2. Using a small screwdriver, carefully release the locking hooks (arrows). 3. Pull the switch...

Centralized door locking system switch
1. Removal: Remove the driver's door trim (see chapter " Salon "). 2. Disconnect connector 2. Centralized door locking system switch 3. Push switch 1 out of...

Push button for interior security alarm
1. Removal: Remove the driver's door trim (see chapter " Salon "), The push button for the alarm system and tow-away protection is located in the door pocket....

Rear door contact switch
1. Removal: Remove the rear door lock (see chapter " Body "). 2. Using a flat-head screwdriver, remove the plastic cover 3 from the locking pins 1. 3. Fold the...

Dismantling and installation of the combination instrument
If we leave aside the steering wheel dismantling, the removal and installation of the combined instrument is relatively easy. However, it is better not to...

Multi-contact plug connections
A multitude of wire connections should not interfere with work with structural elements. In order to gain access to parts or dismantle them, it is often...

Switching relays — description
Each vehicle has a number of consumers that consume a large amount of current compared to others. They are not switched on directly via a switch, but via...

Distribution of fuses by circuits
The main 150 A fuse is located directly on the battery. Most of the fuses for individual consumers and electrical circuits are located in the fuse box on the...

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A4(B8, 2007-2015)

A4(B7, 2004-2008)

A4(B6, 2000-2006)

A4(B6, 2000-2006, petrol)

A4(B5, 1994-2001)

A4(B5, 1994-2001, petrol)