VOLKSWAGEN GOLF IV

since 1997 of release

Repair and car operation

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.