Lincoln E3FZ-9345-D Relay

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If the relay doesn't click during the test, you may try swapping the jumper wires on the control circuit terminals, as polarity can be critical on some relays. If it still doesn't click, it's likely defective and should be replaced.

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.

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. If the relay doesn't click, try swapping the jumper wires on the control circuit terminals.

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. If the relay doesn't click, try swapping the jumper wires on the control circuit terminals.