VOLKSWAGEN GOLF IV

since 1997 of release

Repair and car operation



Foltsvagen Golf 4
+ 1. Maintenance instruction
+ 2. Engine
+ 3. Cooling system
+ 4. Fuel system
+ 5. Exhaust system
+ 6. Ventilation and heating system
+ 7. Coupling
+ 8. Transmission
+ 9. Suspension brackets and power shafts
+ 10. Steering
+ 11. Wheels and tires
+ 12. Brake system
+ 13. Body
- 14. Electric equipment and electroschemes
   14.1. Filament lamps
   14.2. Electric chains
   - 14.3. Detection of not closed chain
      14.3.1. Detection of a rupture of a chain
      14.3.2. Detection of a source of short circuit
      14.3.3. Detection of bad grounding
   14.4. Safety locks
   + 14.5. Accumulator
   + 14.6. Generator
   + 14.7. Starter
   14.8. Replacement of bulbs of external lighting
   14.9. Removal and installation of an additional signal of braking
   14.10. Replacement of bulbs of internal lighting
   + 14.11. Devices of external lighting
   + 14.12. Adjustment of light of headlights
   14.13. Removal and installation of a combination of devices
   14.14. Removal and installation of switches of a steering column
   14.15. Removal and installation of switches
   14.16. Removal and radio receiver installation
   14.17. Removal and installation of high-frequency loudspeakers
   14.18. Removal and installation of low-frequency loudspeakers
   14.19. Recommendations about phone installation
   14.20. Aerial
   14.21. Check of a heater of back glass
   + 14.22. Explanations to electric circuits
   + 14.23. Schemes of electric equipment of the VW Golf car since September, 1997.




14.3.3. Detection of bad grounding

GENERAL INFORMATION

The negative plug of the accumulator is connected to "weight" – to metal of a body, the engine or a transmission; thus many elements of electric equipment are connected in such a manner that only the positive wire, thus a current approaches to them comes back to the accumulator through body metal. It means that fastening of an element of electric equipment and a body are a part of an electric chain. Thereof the bad or rusted fastening can cause refusal of work of an element or lead to its unstable or bad work. In particular, bulbs can burn with dim light (especially if in a point of grounding of this bulb grounding of any else included element of electric equipment is carried out), electric motors can slowly work, and also work of one chain can have effect imperceptible at first sight on work of other chain.

Do not forget that on many cars grounding wires between some elements, such as engines / transmissions and a body, that is in those places where there is no direct contact between metal elements because of soft rubber fastenings or a paint coat are used.

For check of reliability of grounding of an element it is necessary to disconnect the accumulator and to connect one of щупов an ohmmeter to reliably earthed element. Connect another щуп to a wire пли to connection with a body which is necessary for checking. Resistance shown by an ohmmeter should be equal to zero; if is not present, check connection as follows.

If you assume absence of grounding, disassemble connection and clear a site of a body and the wire plug (or a surface of grounding of an element) to pure metal. Carefully remove all traces of dirt, then by means of a knife remove all paint so that reliable contact of two metal surfaces turned out. At assembly reliably tighten socket fastening; at connection of the plug of a wire establish a washer with the jagged edges between the plug and a body surface for ensuring reliable connection. At connection prevent emergence of corrosion in the future, having put a layer of vaseline or silicone greasing.