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