We are undertaking a LED lighting project and have figured out the way circuit in motorcycle works, the AC return is through frame and the DC return (negative) is through the frame to negative ground of battery,
When both AC neutral (return) and DC negative are connected (grounded) to frame of a motorcycle how do the AC and DC waveforms interact and how do AC & DC interact with DC/AC components respectively? That is how does AC interact with DC components and how does DC interact with AC components and how is it possible to connect these circuits together through frame?
That is how circuit is connected but do not understand the laws/electronic properties that allow this to occur?
See wiring diagram below, the pertinent parts are AC generator to DC regulator rectifier and Brown (Br) wire to Ground (frame) shown. Also AC supply to AC headlights and lighting which then returns to field coil on AC generator (shown connected to ground (frame)).