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



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14.1.3. Safety locks

Part of safety locks is located on the considered cars in the assembly block located in a motive compartment.
The block of safety locks in the assembly block in a motive compartment (arrangement, settlement current and purpose of safety locks are specified near the block)

And a part – in the luggage compartment behind the right side panel of finishing.
Safety locks in the luggage compartment (arrangement, settlement current and purpose of safety locks are specified on a back part of the side panel of finishing of the luggage compartment)

Each separate safety lock is used for protection of any concrete electric contour or at once several contours.

In assembly blocks the safety locks of a compact design equipped with bayonet contacts, and which, if necessary, are easily taken by fingers from the nests in the block are used. At refusal any of consumers of the electric power first of all it is always necessary to check a condition of the corresponding safety lock. Include ignition and by means of a lamp sampler probe open plugs of each of safety locks. If the lamp lights up at connection to each of plugs, therefore, safety lock as it should be. If tension takes place only from giving of food, so the safety lock fused. Let's notice also that usually the case of a safety lock is manufactured of transparent plastic through which it is easy to define a condition of a working crossing point.

When replacing of the fused safety lock strictly you watch that the prepared replaceable element corresponded on the type which failed. The safety locks calculated on various nominal current physically can differ in nothing from each other, without being at the same time interchangeable. Each of electric chains has various working parameters and needs various degree of protection therefore replacement of the safety lock calculated on a certain current, safety lock with not the corresponding parameters is fraught with the most serious consequences (up to fire emergence). Working parameters of a safety lock are usually designated on its plastic case, besides, color identification in addition is used (see Specifications in the Head Onboard electric equipment).

If the new safety lock at once after installation also fails, it does not make sense to make its further replacement, - before it is necessary to reveal and remove the cause of an overload in a chain. In most cases that appears the short circuit of a connecting electrical wiring caused by damage of its isolation. Spare safety locks usually are located in free blocks of the assembly block.


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14.1.2. Diagnostics of malfunctions of onboard electric equipment
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14.1.4. Relay