BMW 3 of the E46 series

since 1998 release

Repair and operation of the car


BMW 3 of the E46 series
+ BMW 3 Cars (E46)
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Electric equipment of the engine
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   - Dignostika of electric elements
      Diagnostics of malfunctions of onboard electric equipment - the general information
      Safety locks - the general information
      Replacement of safety locks
      Fusible inserts - the general information
      Chain breakers (thermal relays) - the general information
      The relay - the general information
      Check of the electric motor of a screen wiper
      Check of a stoplight
      Check of the warmed back glass
      Removal and installation of the sensor of temperature
   + Lighting and alarm system
   + Devices and equipment
+ Schemes of electric equipment


Replacement of safety locks

For protection of wires and consumers of electric devices against short circuit and an overload electric chains are protected by safety locks.

Safety locks settle down in the separate block of safety locks which is over a ware box.

1 Before replacement of a safety lock it is necessary to switch off previously surely the corresponding consumer.

2 Open a ware box and turn both white clips (arrows on an illustration) outside. Thus the block of safety locks is released and comes off down. The scheme of an arrangement of safety locks is under a payment of safety locks.

3 Sign of the failed safety lock is the melted metal strip.

4 Take out the failed safety lock. For simplification of capture of a safety lock in the block there is a plastic clip. Put a clip on a safety lock, squeeze and take out a safety lock.

5 Insert a new safety lock on the same maximum current. Its value is specified on the plastic case of a safety lock. Besides, the case has color marking by which it is also possible to determine the size of rated current. And - the melted wire (address to Specifications).


6 Take away the block of safety locks up and fix for what turn white clips outside.

If the new safety lock through short time again burns down, it is necessary to check the corresponding chain of current.

It is always recommended to carry with itself spare safety locks. By no means it is impossible to replace a safety lock with a wire or something similar as it can lead to heavy damages of electric devices.