Lincoln F3OY-13A025-A Relay

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Many vehicle accessories utilize relays for transmitting electrical signals. To check if the relay is fine, take it out of the car and test for continuity across the power circuit terminals. Place a fused jumper wire between one control circuit terminal and the positive battery terminal and another jumper wire between the other control circuit terminal and ground. Check for continuity across the power circuit terminals. It requires replacement if any of these tests are failed by the relay.

To test a suspected faulty relay, follow these steps: Remove the relay from the vehicle. Check for continuity between the relay power circuit terminals (terminals 30 and 87). There should be no continuity between them. Connect a fused jumper wire between one of the two control circuit terminals and the positive battery terminal. Connect another jumper wire between the other control circuit terminal and ground. When the connections are made, the relay should click. Check for continuity between the power circuit terminals (terminals 30 and 87) again. There should be continuity between them now.

If a faulty relay is suspected, it can be removed and tested by a dealer service department or a repair shop.

Relays are used in a vehicle's electrical system to transmit electrical signals to various components, such as the fuel injection system, horns, starter, and fog lamps. They use a low-current control circuit to open and close a high-current power circuit, allowing these components to operate properly.

Several electrical accessories in the vehicle use relays to transmit the electrical signal to the component.