This was just what I needed for 2 bikes, one of the bikes was too old to replace the fan relay and the cheapest I could find was $30 for the fan relay for it. Bicycle. They come with detachable plugs so you can use a plug and wire kit, or if you're lucky and the plug is already set up the same way, just plug and play. The instructions can be confusing if you don't know what you're doing, but I've found that the remote wire that tells the relay to turn on and off can be run on 12 volts or…