Electrical equipment and devices of the car BMW 3 Series E21

Battery, Generator and Starter Specifications
Battery Technical specifications Generator Bosch brand alternating current generator, three-phase, with built-in rectifier unit and electronic voltage...

Fuses and fuses
Fuses and relays are located in a separate block, installed in the engine compartment on the left side of the car. Circuits Protected by Fuses on 4-Cylinder...

Lamps used in the car
Headlights "315", "316", "318" Two round headlights with double-filament lamps. Diffuser diameter mm: 170. Other models Four round headlights. Low beam — outer...

Generator parts
Generator details: 1 - drive side cover; 2 — stator; 3 - rectifier block; 4 - cover from the contact ring side; 5 - voltage regulator assembly with brush...

Starter parts
Starter details: 1 — cap; 2 — starter cover bushing; 3 - cover from the collector side; 4 - excitation windings; 5 — body; 6 - anchor; 7 — brush support plate;...

Removal and installation the generator
Warning: Any work on the generator must be carried out with the engine stopped. Disconnect the red wire from the "B+" terminal and the blue wire from the "D+"...

Disassembly and assembly of the generator
Disassembling and assembling the generator is not difficult (be guided by the detailed view). Check: condition, degree of wear, fit of brushes to rings and...

Replacing generator brushes
Loosen the screws securing the voltage regulator and remove the regulator together with the brush holder from the generator. Unsolder worn brushes and solder...

Checking the generator voltage regulator
Make sure the battery voltage is normal. Connect the voltmeter between the "D+" terminal of the generator and the "ground". Measure the voltage, which at a...

Checking the starter on a car
Make sure the battery is fully charged. Engage one of the gears and press the brake pedal. Turn on the starter for 2-3 seconds and measure the voltage at its...

Removal and installation the starter
Disconnect the wires from the battery terminals. Remove the air filter housing. Disconnect the wires going to the battery and generator from the "30" plug of...

Replacing the traction relay
Remove the starter. Loosen the nut on the lower contact bolt of the traction relay and disconnect the stator winding terminal from it. Loosen the screws...

Disassembling and assembling the starter
Disassembling and assembling the starter is not difficult (be guided by the detailed view). Check: condition and degree of wear of the brushes. The brushes...

Headlight adjustment
It is best to adjust the headlights using movable optical devices. If there are none, then the adjustment can be done using the screen. Make sure the tire...

Windshield wiper parts
Windshield wiper parts: A - until April 1979.; 3 - since April 1979. 1 - Electric motor; 2 — casing; 3 - support bar; 4 — brush lever axis; 5 - intermediate...

Removal and installation the windshield wiper motor
Removal Disconnect the cable from the negative battery terminal. Disconnect the drive rod. Mark the position of the electric motor crank. Loosen the crank...

This section is available on russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian

Share information: