E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 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. Good advice
   14.2. Changed numbers
   14.3. Purchase of the old car or mysterious set of figures and letters
   14.4. Durability of the car
   14.5. About parallelism of bridges of the car and the trailer
   14.6. Preparation of the car for winter
   14.7. Rule 35
   14.8. Choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Emergence in deposit oil
   14.12 whether. It is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is rather live, than it is dead …
   14.15. It is not got - good advice
   14.16. Visit to car-care center
   14.17. A gear belt for a drive of the mechanism of a gazoraspredeleniye
   14.18. Wear of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   14.22. As the conditioner works and what to do, if it failed
   14.23. Conditioner: not only "pluses", but also "minuses"
   14.24. Rules of service of the conditioner
   14.25. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know upon purchase of the air filter
   14.27. Engine overheat
   14.28. That it is necessary to know to the owner of the car with the injector engine
   14.29. Accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. Catalyst
   14.34. Rub in one - or how to save the catalyst
   14.35. Probuksovochka
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. ABS: natural choice
   14.40. Rims
   14.41. We update rims
   14.42. Scheme of marking of a car tire
   14.43. Metal corrosion
   14.44. Automake-up
   14.45. What creaks?
   14.46. Hatch
   14.47. Safety cushion: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Galogenki"
   14.52. About the correct adjustment of headlights
   14.53. Electric motor
   14.54. From change of places "composed" changes nothing?

14.51. "Galogenki"


The main reason for fast failure of halogen lamps in cars – the big current proceeding through a lamp at the moment of inclusion as resistance of its thread in a cold condition is many times less, than in warm.

In this regard it is recommended to limit a starting current by means of the additional resistor which has been switched on consistently with threads of an incandescence of halogen lamps. After inclusion of a lamp it is resistance it is short-circuited by means of the relay of the tension established parallel to a lamp.

Lack of such devices is need of use of one or two electromagnetic relays, details insufficiently reliable, especially in the conditions of the car testing vibration. Besides, at the moment of inclusion spasmodic increase of a current, though to smaller size after all takes place, than at usual schemes of inclusion of lamps.

Experts developed the contactless device not demanding use of the relay and providing smooth increase of a current in a lamp. The device consists of the additional R1 resistor, two VD1 and VD2 diodes and the electrolytic condenser C.

At inclusion of a thread of a passing beam on a clip 1 the positive potential moves. Thus the VD1 diode connects the condenser C parallel to a lamp thread, and is consecutive with it – the R1 resistor.

At inclusion of a thread of a driving beam the positive potential moves on a clip 2, and the condenser C is connected parallel to a thread of a driving beam via the VD2 diode.

At such scheme of connection tension on lamps of EL1 and EL2 accrues smoothly.

Resistance of cold threads of usual automobile lamps of near and far light approximately 10 times less their resistance in a warm condition. The constant of time of heating of a thread of a lamp makes 0,0014–0,003 pages.

For an exception it is inadmissible a big current in the course of inclusion of a lamp it is necessary, that speed of increase in resistance of a thread of a lamp was more speed of increase of tension. It is reached by installation of electrolytic condensers in capacity 4000–6000 мкФ, rated voltage of 25 Century.

If to use these councils, along with increase in service life of lamps accumulator life because of decrease in a starting current and increase in smoothness of its increase will last also.