Electrical equipment and devices of the car BMW 5 Series E28

General information about the on-board electrical system
The electrical system of this vehicle is twelve-volt, with a negative ground wire. Power for the lighting and other electrical devices comes from a lead-acid...

General information about troubleshooting electrical circuits
A typical electrical circuit consists of an electrical component, switches, relays, motors, fuses, fuse links, or circuit breakers connected to that component,...

Removal and installation the battery
Depending on the model, the battery may be located in the engine compartment, in the rear cargo area, or under the rear seat. Consult your vehicle's owner's...

Checking the condition and replacing the battery wires
Examination Periodically inspect the entire length of each battery cable for damage, cracks, burnt insulation, and corrosion. Poorly maintained cable ends can...

General information about fuses
The electrical circuits of the vehicle are protected by a combination of fuses, circuit breakers and fuse links. The fuse box is located under the instrument...

General information about relays
Engine compartment relay. Some accessories in a car use a relay to transmit an electrical signal to a component. If the relay fails, the component will no...

Checking and replacing turn signal and hazard warning flashers
Some of the latest models are equipped with an air bag, or Supplemental Restraint System (SRS). To avoid possible damage to this system, the manufacturer...

Removal and installation switches on the steering column
Some of the latest models are equipped with an air bag, or Supplemental Restraint System (SRS). To avoid possible damage to this system, the manufacturer...

Removal and installation the ignition switch
Some of the latest models are equipped with an air bag, or Supplemental Restraint System (SRS). To avoid possible damage to this system, the manufacturer...

Removal and installation the radio
If your car radio is equipped with an anti-theft system, make sure you have entered the correct code before disconnecting the battery cable. Refer to Section...

Removal and installation the antenna
If your car radio is equipped with an anti-theft system, make sure you have entered the correct code before disconnecting the battery cable. Refer to Section...

Removal and installation instrument panel components
The instrument cluster and its components are very susceptible to static electricity. Make sure you are grounded and free of static electricity (touch the...

General information about the Service Reminder (SI) indicator light panel
All models that have service reminder warning lights are equipped with an SI panel located in the instrument cluster. This panel turns on the warning lights...

Replacing headlight bulbs
If your car radio is equipped with an anti-theft system, make sure you have entered the correct code before disconnecting the battery cable. Refer to Section...

Headlight beam adjustment
The headlights must be correctly adjusted. Incorrectly adjusted headlights can blind oncoming drivers and cause a serious accident, or significantly reduce...

Removal and installation the headlight housing
If your car radio is equipped with an anti-theft system, make sure you have entered the correct code before disconnecting the battery cable. Refer to Section...

Replacing lamps
Many headlights have protective lenses that are held in place with screws, making it easy to access the bulbs. 1. On some lights, the protective lenses are...

Removal and installation the windshield wiper motor / rear door glass
If your car radio is equipped with an anti-theft system, make sure you have entered the correct code before disconnecting the battery cable. Refer to Section...

Checking the operation and repairing the rear window defroster
The rear window defroster consists of several horizontally located elements on the glass surface. Minor damage to the element can be repaired without removing...

General information about the Supplemental Restraint System (SRS)
The latest models are equipped with a supplemental restraint system (SRS), which includes an airbag. This system is designed to protect the driver from serious...

Description and testing of the speed control system (tempostat)
Speed control system (tempostat or cruise control) maintains the vehicle's speed using a vacuum servomotor located in the engine compartment, which is...

Description and testing of the central door locking system
The central door locking system operates the door locking actuators installed on each door. The system consists of switches, actuators and wiring. Diagnostics...

Description and testing of the electric window lift system
The power window system operates electric motors mounted in the doors that raise and lower the window glass. The system consists of control switches, motors,...

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