For detection of a source of short circuit disconnect elements of loading of a chain (elements which consume an electric current, such as lamps, electric motors, heating elements etc.).

Take from the assembly block the corresponding safety lock and connect щупы a tester or the voltmeter to its plugs.

Provide food existence in a chain, remembering thus that some chains of electric equipment join only at key turn in the ignition lock in a certain situation.

If a control lamp or indications of the voltmeter testify to existence in a tension chain, in a chain there is a short circuit.

If at carrying out check tension in a chain is absent, however the safety lock still fuses, it testifies to failure of an element of loading.