Features for an Intelligent Accessory Controller for Off-Road Vehicles
Accessories, such as lights, lockers, winches, etc., in off-road vehicles are typically controlled via relays in the engine bay and toggle-switches in the cabin.
Imagine a more advanced design, where the switches/relays can be controlled not only by toggle-switches, but actions that car performs on its own (such as when lights automatically go on, high-beams, blinkers, etc.).
This design would still electrically isolate your accessories from the car's systems, but also talk to the car's computers to understand what's going on.