Check of integrity of a chain is necessary to define, whether is not present in a rupture chain. Disconnect pressure from a chain and check up a chain on integrity by means of a bulb with the connected power supply.
Connect bulb wires to the chain ends (or by the positive end and (weight) the car). If the control bulb lights up, in a chain there are no ruptures. If the bulb does not light up, means, somewhere in a chain there is a rupture.
Precisely also it is possible to check up the switch, having connected a control bulb to switch plugs. After switch inclusion, the control bulb should light up.
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