The car is equipped with two types of four-contact relays, which differ in color and maximum current strength, but are the same in terms of the principle of operation, therefore these relays are checked in the same way.
The principle of operation of the relay is based on the closure of contacts under the action of an electromagnetic force that occurs in the coil when an electric current passes through it. Therefore, to test the relay, it is necessary to apply voltage to the control contacts «85» And «86» (contact numbers are marked on the relay housing) and measure the resistance between the power contacts «30» And «87».
If the relay is OK, there will be a click and the resistance will be close to zero (infinitesimal). Otherwise, the relay is defective and must be replaced.
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