Electrical equipment and devices of the car BMW 3 Series E30

Replacing fuses
To prevent overloads and short circuits, some circuits are protected by fuses. The fuses are located in the fuse box, located in the passenger compartment on...

Checking the relay
The easiest way to check a relay is to replace it with a known good relay. As a rule, relays are checked at a service station in this way. However, since there...

Generator
BMW cars are equipped with an alternator. Depending on the model and equipment, the generator power can range from 65 to 90 A. The generator operates from the...

Removal and installation the generator
Removal Disconnect the ground wire from the battery. On six-cylinder models: Disconnect the battery terminal at the connector. Loosen the tension and remove...

Removal and installation the alternator belt/tensioning the alternator belt
Removal Unscrew nut "1" from the generator and turn tension roller "2" to the left. Remove the V-belt. Installation Before installation, check the V-belt. If...

Replacement and testing of generator and voltage regulator carbon brushes
Carbon brushes are checked as part of the vehicle maintenance schedule every 60,000 km. Removal Removal of carbon brushes is possible without removing the...

Generator fault diagnostics

Starter
To start an internal combustion engine, a small electric motor, a starter, is required. To start the engine, it is necessary for the starter to develop up to...

Removal and installation the starter
Removal Disconnect the ground wire from the battery. Four-cylinder engine with carburetor Raise the car. Unscrew the bracket on the starter. Disconnect the...

Removal and installation the traction relay
If the traction relay is defective, the starter pinion does not engage with the flywheel ring gear. Because of this, the starter is unable to turn the engine....

Starter fault diagnostics
If the starter does not turn the engine, first check for voltage at terminal 50 of the traction relay (minimum 8 V), sufficient for its operation. If the...

Lighting system. General information
Before replacing a lamp, switch off the corresponding consumer. Warning: Do not touch the bulb with your fingers. Fingerprints will make it cloudy and - due to...

Replacing incandescent lamps
Headlights Open the engine compartment hood. Low beam and parking lights are located in the outer headlights. High beam lights are located in the inner...

Removal and installation headlights
Removal Open the engine compartment hood. Disconnect the ground wire from the battery. Remove the plastic cover from the back of the headlight. To do this,...

Removal and installation front turn signals
Removal Disconnect the wire from the battery. Remove the front bumper. Loosen the screws and remove the turn signal from the bumper. Installation Insert the...

Removal and installation rear lights
Removal Disconnect the ground wire from the battery. Open the tailgate and remove the reflector. Pull out connector "1". Loosen the screws and remove the tail...

Headlight adjustment
Headlight adjustment is of great importance for ensuring traffic safety. Accurate headlight adjustment is only possible with a special adjustment device....

Devices. General information
On BMW 3 Series vehicles, the instruments are assembled on the instrument panel. After removing the instrument panel, individual instruments or lamps can be...

Removal and installation the instrument panel
Removal Disconnect the ground wire from the battery. Remove the lower trim. Note: To remove the instrument cluster, you may need to remove the steering wheel....

Removal and installation incandescent lamps in the instrument panel
Removal Remove the instrument panel. Press the defective lamp lightly and pull it out by turning it to the left. Installation Insert the incandescent light...

Removal and installation indicators and speedometer
Removal Remove the instrument panel. Remove the daily mileage reset and clock time setting knobs from the front side of the instrument panel. Loosen the...

Removal and installation the turn signal switch and windshield wiper
Removal Disconnect the ground wire from the battery. Remove the lower instrument panel trim (see section " Removal and installation the center console and...

Removal and installation the light switch
Removal Disconnect the ground wire from the battery. Remove the lower instrument panel trim (see section " Removal and installation the center console and...

Removal and installation the radio
Factory-installed radios come with different mounting options. If the receiver has a quick-release mount, it allows for quick removal and installation of the...

Removal and installation speakers
Removal Disconnect the ground wire from the battery. Models produced since August 1985. Partially pull back the edge banding of the side paneling in the...

Removal and installation the antenna
Removal Automatic antenna Pull out the jack. Remove the rear light trim (see section " Removal and installation rear lights "). First pull up and then remove...

Removal and installation, adjustment of windshield washer jets
Removal Open the engine compartment hood. Disconnect the supply hose from the distributor to the jet in the middle of the engine compartment hood. First,...

Removal and installation the telescopic pin of the automatic antenna
To replace the telescopic rod, the automatic antenna does not need to be removed. The telescope is replaced together with the plastic core. Removal Turn on the...

Removal and installation the windshield wiper motor
Removal Disconnect the ground wire from the battery. Remove the arms of both wipers. Move the arm "1" away from the windshield and thereby release the plastic...

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