I turned it off and when I tried to turn it back on it beeps and won’t turn the key to on

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. If the key won't turn in your Grand Marquis, the issue could be with the ignition cylinder, the steering wheel lock, or the anti-theft system. First, check if the steering wheel is locked by gently turning it side-to-side while trying to turn the key. Sometimes, the wheel locks hard against the ignition mechanism, preventing the key from turning. If that doesn't help, the ignition cylinder may be worn or jammed. Try wiggling the key slightly as you turn it, but avoid forcing it to prevent damage. If the anti-theft system is involved, a blinking security light on the dashboard might indicate this. Disconnecting the battery for a few minutes may reset it, but it's essential to have the system checked if this persists. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!