E46 series BMW 3

since 1998 of release

Repair and car operation

E46 series BMW 3
+ BMW 3 Cars (E46)
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply systems, injection and release
+ engine Electric equipment
+ 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
      Stoplight check
      Check of warmed back glass
      Removal and installation of the sensor of temperature
   + Lighting and alarm system
   + Devices and equipment
+ electric equipment Schemes

Safety locks - the general information

Protection of electric contours of the car is provided with application of a combination of safety locks, breakers of a chain and fusible inserts. The burned-down safety lock is easy for distinguishing from serviceable by survey of its transparent plastic case. Attentively examine a safety lock about identification of its peregoraniye. If the safety lock outwardly looks normally, but suspicions on its malfunction remained, make conductivity check between the knife plugs acting from its case.

At replacement of safety locks watch compliance replaceable old on type. The safety locks calculated on a various current can outwardly look identical therefore it is necessary to give special attention to marking. Replacement of the burned-down safety lock on calculated on smaller - and especially big - a current is undesirable. Each electric contour needs different extent of protection. Watch that marking on the case of a safety lock corresponded to a current on which the corresponding contour is calculated.

If the replaced safety lock immediately fuses, it is not reasonable to continue its replacement. Before it is necessary to reveal and eliminate the reason of its knocking-out. In most cases that appears short circuit of electroconducting of the contour, caused by break or damage of isolation of a wire.