Accessory Relay Wiring Diagram. Relays are a mechanical device that can connect or disconnect power to an accessory when it gets a low voltage signal from a switch. If you want a normally closed relay you will want to wire to 87a.
The left side is the pin out of the point is sticking out from at the bottom and the the right side is showing a schematic representation of the relay circuitry. They commonly use an electromagnet coil to operate their internal mechanical switching mechanism contacts. Presumably your motorcycle doesnt have a dedicated accessory circuit or youd just be using that.
As in the diagram a wire is run from a 12 volt power source to the switch in the cab and out to the relay placing a fuse at the source of the power.
Radio On Until Door Opened Retained Accessory Power - Negative Door Trigger Relay Wiring Diagram. A relay is an electrically operated switch. The positive lead on the 15-amp circuit I want to power. The switched power source.