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Unloading relay of contact X
In onboard electric system the unloading relay of contact X (by the way, the simple switching relay) plays a significant role. Therefore the principle of its work here is described.
Contact X the lock of ignition receives a food, only if the ignition key costs in the situation "trip". Via this plug powerful consumers of a current, such as a screen wiper, heating of back glass or the fan in order that at engine start all "force" of the storage battery went on starter work are connected. Certainly, not all these consumers can receive the food through contact in the ignition lock; for this purpose it is too weak. Therefore between them relay connection is necessary, and supply by a food is carried out through it. Contact of the lock of ignition answers (along with supply of headlights by a food) only for a switching current to the relay.
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