BMW 7_aya the E38 series from 1994 to 2002
1. Introduction
2. Governing bodies and methods of operation
3. Settings and routine maintenance of the car
4. Engine
5. Cooling systems of the engine, heating, ventilation and air conditioning
6. A power supply system and production of the fulfilled gases
7. Systems of electric equipment of the engine
8. Manual box of gear shifting and coupling
9. Automatic transmission
10. Cardan and power shafts, reducer, differential and stupichny assemblies
11. Brake system
12. Suspension bracket and steering
13. Body
14. Onboard electric equipment
14.1. General information, diagnostics of malfunctions
14.1.1. General information
14.1.2. Diagnostics of malfunctions of onboard electric equipment
14.1.3. Safety locks
14.1.4. Relay
14.2. Lighting fixtures
14.3. Screen wipers and washers
14.4. Other electric equipment
15. Schemes of electric equipment



14-1-obshhaya-informaciya-diagnostika-neispravnostejj.html

14.1. General information, diagnostics of malfunctions

General information

The BMW E38 cars are equipped with 12-volt system of electric equipment with grounding on a negative pole. Power supply of all lighting fixtures and electric units is carried out from the battery recharged from the generator of alternating current.

This head is devoted to the description of procedures of service and repair of some components of system of onboard electric equipment to which number besides the concrete components considered below also all lighting fixtures and electric accessories which are not connected directly with the engine belong. Besides, procedures of diagnostics of malfunctions of electric equipment of the general order are considered. Information on the battery, the generator and a starter is provided in the Head Sistemy of electric equipment of the engine.

When performing any works on repair and service of components of system of electric equipment it is necessary to disconnect without fail previously a negative wire from the battery in order to avoid receiving an electric trauma and/or ignition.



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14. Onboard electric equipment
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14.1.1. General information