The relays are mounted in a single unit located in the engine compartment, as well as in various parts of the car. The relay can be taken out and checked, the faulty relay is changed.
Examination
1. The most reliable results are obtained by testing using a relay switching circuit. If there is no wiring diagram, check with the following information.
2. A pair of terminals of any relay is connected to a coil that provides the operation of the relay. The remaining outputs in pairs close or open when the coil is energized.
3. As a rule, the pin assignment is indicated on the relay housing.
4. Connect one of the terminals of the relay coil to the positive terminal of the battery through a wire with thin wire as a fuse. Connect the second output to ground. Once connected, you should hear a click. If there is no click, then reverse the connection polarity (connection polarity matters on some relays).
5. Check the presence of a circuit between the relay outputs in accordance with the markings on the case.
6. If the test results are negative, replace the relay.