Electrical equipment and devices of car VW Transporter T4

Electrical system — general information
Under the concept of voltage in the car, as a rule, we mean the voltage of the battery. This is a constant voltage of about 12 V. The battery voltage depends on the charge and the...

Voltage measurement
Measuring instruments Pilot lamp and voltage indicator Voltage measurement Voltage can be determined with a simple test lamp or voltage indicator. In this case, only the presence...

Current measurement
Current measurement In a machine, it is relatively rare to measure the current strength. To measure the current strength, it is necessary to open the circuit, and connect an...

Resistance measurement
Resistance measurement Before checking the resistance, make sure that there is no voltage on the part to which the ohmmeter is connected. Therefore, always disconnect the plugs,...

Installing additional electrical accessories
Clips for attaching additional wires When working on the electrical system, in order to prevent the danger of a short circuit in the electrical wiring, the earth cable must always...

Troubleshooting in electrical equipment
When troubleshooting electrical equipment, it is important to act systematically. This applies to both checking burned-out incandescent lamps and idle electric motors. The first...

Incandescent lamp test
1. Remove the lamp and check the external inspection. If the filament is burned out or the glass bulb is loose in the base, replace the bulb. 2. In order to make sure that the...

Checking electric motors
Comfort in the car is more and more provided by electric motors that control power windows, a sliding roof (hatch), central locking or electrical antenna. Each engine is turned on...

Checking switches
Most electrical consumers are manually operated using switches. In addition, there are automatic switch-on switches. Such switches include, for example, an oil pressure switch, a...

Checking lamp and motor switches
1. Remove switch. 2. A simple switch has two cable connections. In this case, a positive voltage is always applied to one connection (+) and after switching on on the other...

Checking sensors
Examples of sensors: oil pressure sensor, coolant and brake fluid level sensors. 1. Connect a test lamp or an ohmmeter to the suitable and outgoing wire of the sensor. To do this,...

Relay — description and test
Relays are found in many current electrical circuits. The switching relays work like a switch. For example: if the high beam is turned on manually by the switch, then the...

Wiper motor — description and verification
The wiper motor is located in the water box under the windshield, by the rear wiper in the tailgate. To check it is necessary to remove the corresponding guard. The following...

Direction indicator system — description and verification
The flashing and alarm cycle is set by the relay. The alarm is connected to a relay without a fuse. The direction indicators have a fuse in the fuse box. Examination If the...

Stoplight — check
1. If the brake light does not come on, check the fuse in the fuse box first. 2. If the fuse is good, check the brake light bulbs and replace if necessary. 3. If the stop lamps...

Sound signal — description and verification
Depending on the equipment, the VW T4 has a single or two-tone horn located in the engine compartment under the bumper. When you press the horn switch on the steering wheel, the...

Heated rear window — description and check
After turning on the heating of the rear window, it heats up, being cleaned of moisture and ice, passing through the visible conductors of the current. Examination 1. In the event...

Replacing fuses
Relays and fuses In order to prevent damage to wires or consumers due to short circuits or overloads, individual circuits are protected by fuses. The fuses used meet the increased...

Control lamps — removal and installation
Pilot lamps Pilot lamps (1) (direction indicators), (2) And (3) are LEDs. Removal and installation 1. Remove instrument cover. 2. Remove the cover from the lamp carrier and take...

Checking the LEDs
LED test Examination 1. Connect the LED to a 1.8 V DC source. The diode should be on. Installed (on the instrument panel) pre-resistances are connected, which reduce the voltage...

Voltage stabilizer — removal, inspection and installation
Checking the stabilizer 1. Voltage stabilizer; 2. Mounting screw; 3. Radiator The stabilizer maintains a constant voltage on the devices. The stabilizer must be checked if the...

Control devices — removal and installation
Pointing devices Control devices can be removed forward after removing the visor without the instrument panel. Removing 1. Disconnect ground cable (-) from the battery. Attention!...

Speedometer roller — removal and installation
Attention! Incorrect location of the speedometer shaft will cause noise in the speedometer area, side-to-side oscillation of the speedometer needle, and damage to the shaft....

Instrument panel — design description
Instrument panel 1. Lid; 2. Tachometer; 3. Mechanical speedometer; 4. Pointing device; 4A. Coolant temperature and fuel gauge with cutout for digital clock; 5. A control lamp of...

Instrument visor (torpedo) on the instrument panel
Attention! Gauges, indicator lamps with frames and illumination lamps, as well as a voltage stabilizer, after removing the visor, can be removed from the front without removing...

Combination steering switch — design description
Steering wheel combination switch, steering lock housing 1. Lid; 2. Contact board of a sound signal; 3. Hex nut, 70 Nm; 4. Steering wheel; 5. Screws; 6. Left combined handlebar...

Removal and installation of the combined switch of a wheel
Combination switch Removing 1. Disconnect ground cable (-) from the battery. Attention! At the same time, the anti-theft code is erased from the radio's memory. The battery must...

Connections on steering wheel combination switch and steering lock
Contact groups A. Ignition switch: 1. Terminal 15; 2. Terminal X; 3. Terminal 50; 4. Terminal 30; 5. SU terminal (for machines supplied with radio receiver) B. Plug connection,...

Digital clock backlight
The digital clock backlight is located on the back of the instrument panel. Removing 1. Remove instrument panel. 2. Rotate lamp frame 90° (1/4 turn), until the notch on the frame...

Radio receiver — removal and installation
Removal and installation of the radio receiver Factory-installed radios are equipped with a case that allows you to quickly install and remove it. However, this is only possible...

Entering the radio code for radios
Applies only to VW radios with code. The anti-theft radio code prevents the radio from being switched on unintentionally if the power supply is interrupted. The power supply may...

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