Relay Board Wiring Diagram. When a relay contact is open this will switch power on for a circuit when the coil is activated. Megasquirt relay board wiring diagram.
When a relay contact is open this will switch power on for a circuit when the coil is activated. Connect the side leading to the light bulb to the no terminal of the relay and the side leading to the plug to the c terminal. Relay can be the best option to control electrical devices automatically.
Terminal 85 connect to a suitable earthing point on the vehicle chassis.
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