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BMW 3 Series E46since 1998 releaseRepair and operation of the car |
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BMW 3 Series E46 + BMW 3 cars (E46) + Current leaving and service + Engine + Cooling systems, 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 - Dignostic 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 |
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. It is easy to distinguish the burned-down safety lock from its transparent plastic case, serviceable by survey. Attentively examine a safety lock regarding identification of its burn-out. If the safety lock externally looks normally, but suspicions on its malfunction remained, make check of conductivity between the knife plugs acting from its case. When replacing safety locks you watch compliance replaceable old on type. The safety locks calculated on various current can externally look identical therefore special attention should be paid to marking. Replacement of the burned-down safety lock on calculated on smaller - and especially big - current is undesirable. Each electric contour needs different degree of protection. You watch that marking on the case of a safety lock corresponded to the 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 remove the cause of its knocking-out. In most cases that appears the short circuit of an electrical wiring of a contour caused by break or damage of isolation of a wire. |
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