BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

+ 1. The maintenance instruction
+ 2. Maintenance service
- 3. The engine
   + 3.1.2. Specifications
   + 3.2. Dismantle and engine major repairs
   - 3.3. An engine electric equipment
      3.3.2. Specifications
      3.3.3. The battery - engine start-up in emergency situations
      3.3.4. Removal and battery installation
      3.3.5. Power cables
      + 3.3.6. Ignition system
      + 3.3.7. System of a charge of the battery
      + 3.3.8. System of start-up of the engine
      3.3.9. Malfunctions of the generator
      3.3.10. The basic malfunctions of an electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. A running gear
+ 12. A body
+ 13. An electric equipment
+ 14. A good advice

3.3.5. Power cables


1. Periodically check cables on all length, damage, растрескивание or the burn-out of isolation of cables, and also corrosion are not supposed. Unreliable connection of the battery can cause refusals at engine start-up, and also deterioration of operational qualities of the engine.
2. Check up a condition of connections of poles with plugs, presence on them corrosion, cracks and easing of fastening of wires. Presence of a white shelled touch under isolation in a plug place testifies to corrosion of conductors of a cable and necessity of its replacement. Check up presence of corrosion and deformations on plugs and a condition of bolts of fastening.


1. Disconnect from the battery old cables, track packing of cables on their length and find places of their fastening to a starter and to weight, disconnect cables from the traction relay of a starter and weight. Remember a route of a lining of a cable to lay a new cable to the place of the replaced.
2. If cables are replaced new getting new cables, grasp with itself old. New cables should correspond in accuracy to the replaced. The cable of a positive pole is easy for distinguishing from a cable negative – isolation of a cable of a positive pole of usually red colour, these cables have большее cross-section section, the storage plug differs in the big diameter. Isolation of a cable of connection with weight of black colour, cross-section section and diameter of the plug is less, than at a cable of a positive pole.
3. Clear carvings of fastening of cables of the battery on the traction relay of a starter and on a body, remove corrosion traces.
4. Attach a cable to the traction relay of a starter or to weight, reliably tighten nuts and fastening bolts.
5. Before joining to the battery of a new cable be convinced that the cable has sufficient length, and will be established without a tension.