parkplusio How To Stop Car Alarm parkplusio Explore Ahead parkplusio Use Key Fob If your car has a remote key fob, press the "unlock" button to turn off the alarm. This will usually silence the alarm and disarm the security system. parkplusio Turn Key In Ignition Inserting the key in the ignition and turning it to the "on" position can sometimes turn off the alarm. parkplusio Disconnect Battery Locate the car battery and use a wrench to loosen and remove the negative terminal. This will cut power to the alarm system and should silence the alarm. Get a car loan in less than 2 days! Download the Park+ App from the link below! parkplusio Download the Park+ App!