Electrical equipment and devices of the car BMW 7 Series E38

BMW E38 vehicles are equipped with a 12 volt negative ground electrical system. All lighting fixtures and electrical units are powered by a battery recharged by an alternator.

This chapter describes maintenance and repair procedures for certain components of the on-board electrical system, which include, in addition to the specific components discussed below, all lighting fixtures and electrical accessories not directly related to the engine.

On-board electrical equipment specifications
Power and type of lamps used (12 V) Type // power (W) of lamps in headlights Before 09.1998 issue. H1, 55 W Since 09.1998 issue. H7, 55W Xenon headlight D2-S...

Diagnostics of faults of on-board electrical equipment
The procedures and codes for diagnostics of electronic control systems are discussed in Chapter Engine electrical systems . A typical electrical circuit may...

Fuses — purpose and location
In the vehicles in question, some of the fuses are located in the fuse box located in the engine compartment. Fuse box in the engine compartment mounting block...

Relay — purpose and replacement
To supply power or control signal to some of the electrical consumers in the vehicle (such as fuel injection system components, horn, starter, cooling fan, fog...

Removal and installation windshield wiper arms and blades
Brushes 1. Bring the windshield wipers to the vertical position. To do this, turn on the ignition and set the windshield wiper switch to the interval mode....

Removal and installation the wiper arm bracket
Bracket (assembled) 1. Remove the air intake box and wiper arms (see section Windscreen wipers and washers ). 2. Fix the hood in the installation position by...

Checking and adjusting the installation angles of the windshield wiper arms
The angle of the windshield wiper arm installation on the windshield primarily determines the quality of glass cleaning in interval mode and at low vehicle...

Adjusting the windshield washer nozzles
Adjustment on models with three nozzles A1 — 200 A2 — 400 B1, B2 — 400 C1, C2 — 450 D1 — 230 D2 — 350 E1 — 500 E2 — 350 F1 — 550 F2 — 350 Adjustment on models...

Removal and installation of sensors and antennas of auxiliary systems
Rain sensor 1. Remove the interior rearview mirror. 2. Squeeze the lid from the sides, move it slightly upwards, hook it and remove the lid. When installing,...

Removal and installation of control units
Door control unit 1. Remove the door trim (see chapter Body ). 2. Disconnect the connectors, remove the screws and remove the door control unit. Rear Window...

Removal and installation switches
Basically, to remove any switch, circuit breaker, or circuit breaker assembly, you have to push it out of the panel and disconnect the connector. Below are...

Removal and installation of the instrument cluster and its components
1. Extend and lower the steering column to the stop. 2. Remove the screws and slide the instrument cluster forward. Cover the steering column with a cloth. 3....

Audio unit and speakers
Audio block 1. Remove the protective caps on the right and left sides and unscrew the screws. 2. Remove the audio unit and disconnect its electrical wiring...

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