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14-2-3-proverka-nadezhnosti-zazemleniya.html
14.2.3. Check of reliability of groundingThe negative plug of the accumulator is connected to (weight) of the car – to metal of the engine / of a transmission and a car body – and the majority of systems of an electric equipment are developed so that one feeding wire approached to an electric equipment element only, and the current came back through metal of a body of the car.
It means that fastening of an element of an electric equipment and a car body are a part of an electric chain.
Therefore, the bad or oxidised fastening can be at the bottom of a great number of malfunctions in electric equipment system, from a full exit of a chain out of operation before its unreliable work.
In particular, bulbs can burn dimly (especially if other chain using the same grounding) is included, engines (for example, engines of screen wipers or the fan of cooling of a radiator) can slowly work and inclusion of any chain can influence work of other chain.
Notice that on many cars connecting earthing strips between various units of the car are used, for example, between the engine / a transmission and a body, usually when between elements there is no metal contact because of use of rubber fastenings etc.
| PERFORMANCE ORDER |
| 1. Disconnect the accumulator and connect one of щупов an ohmmeter to (weight) of the car. |
| 2. Connect the second щуп to a wire or a point of grounding which is necessary for checking up. The resistance registered by an ohmmeter, should equal to zero; if is not present, check up connection as follows. |
| 3. If you consider that connection is not perfectly in order, disassemble connection and smooth out to pure metal a contact surface and the plug of a wire or a surface of an earthed element. |
| 4. Remove completely a dirt and corrosion traces, then, by means of a knife remove a paint coat to receive reliable connection of metal with metal. |
| 5. At assemblage, reliably fix connection; at installation of the plug of a wire, use gear washers between the plug and a body. |
| 6. After connection, for prevention of formation of corrosion put on connection a layer of vaseline or silicone greasing or process its hermetic, such, as (Holts Damp Start) or water-repellent greasing, such, as (Holts Wet Start). |
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