BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car



BMW E30
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   + 3.1.2. Specifications
   + 3.2. Dismantle and capital repairs of the engine
   - 3.3. Engine electric equipment
      3.3.2. Specifications
      3.3.3. The battery - launch of the engine in emergency situations
      3.3.4. Removal and installation of the battery
      3.3.5. Power cables
      + 3.3.6. System of ignition
      + 3.3.7. System of a charge of the battery
      + 3.3.8. System of launch of the engine
      3.3.9. Malfunctions of the generator
      3.3.10. Main malfunctions of electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Useful tips



3.3.5. Power cables

Check

PERFORMANCE ORDER
1. Periodically check cables on all length, damage, cracking or a burn-out of isolation of cables, and also corrosion are not allowed. Unreliable connection of the battery can be a cause of failures at launch of the engine, and also deterioration in operational qualities of the engine.
2. Check a condition of connections of poles with plugs, existence on them of corrosion, cracks and weakening of fastening of wires. Existence of the white shelled raid under isolation in the place of the plug demonstrates corrosion of conductors of a cable and need of its replacement. Check existence of corrosion and deformations on plugs and a condition of bolts of fastening.

Replacement

PERFORMANCE ORDER
1. Disconnect old cables from the battery, track laying 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 laying of a cable to lay a new cable to the place of replaced.
2. If cables are replaced new, then getting new cables, take with yourself old. New cables have to correspond in accuracy to replaced. It is easy to distinguish a cable of a positive pole from a cable negative – isolation of a cable of a positive pole of usually red color, these cables have bigger cross section, the accumulator plug differs in big diameter. Isolation of a cable of connection with the mass of black color, cross 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 bolts of fastening.
5. Before accession to the battery of a new cable be convinced that the cable has sufficient length, and it will be established without tension.