Relay wiring basics. I hope this helps someone out there that wants to utilize a relay to operate, for example, air horns or maybe passing lights on their Royal Star or other scooter. To prevent the overload of wiring or switches.
Air horns draw more current than the standard factory horn.
The relay in the drawing is an ECG brand, model RLY8722F and any good electronics parts house will have them. The view is looking at the bottom of the relay. The little lines are male spade type lugs that stick out from the bottom of the relay. The lugs are numbered as shown in the drawing. Terminal 87a is not used.