If you’re looking to make your car horn louder, there are a few things you can do. First, check the air pressure in your tires. If they’re underinflated, the air will be forced out of them more quickly and the horn will sound louder. Second, make sure your car’s horn is working properly by checking for a light on the dashboard that indicates it’s activated. Finally, use caution when driving and use your horn sparingly – it’s not worth getting pulled over for a loud horn! ..