Put the key in the driver’s door and turn it twice to the right, then twice to the left. Then insert your key into the ignition and start the car. [4] X Research source Turn the key into the unlock position and hold it for two seconds before opening the door.

If it is more easily accessible you can also unplug the wiring harness that connects to the car’s horn or siren. If the horn or siren gets unplugged it can no longer make noise.

If you cannot locate the alarm fuse right away, remove fuses to see if the alarm will stop. Doing this will not cause damage to the car, but make sure you return the fuses after you’ve determined they are not for the alarm. Some car alarms, when tampered with, prevent a car from starting as an anti-theft function. If you remove the fuse and cannot start the vehicle, you will have to take the car to a mechanic or dealer.

Control unit. This part is often referred to as the brain because it functions as the command center for the system. Alarm transmitter. This comes in two forms: key-chain remote or the key. Sensors. Alarms vary and can get complex with various sensors such as pressure, door, or window sensors. Siren. Alarms need some type of warning signal; some systems have their own siren component while others are wired to car stereo. Wires. Wires connect the siren to the control unit, the control unit to the fuses, and the control unit to the sensors. [7] X Research source

Pull the wire of the siren. This will silence the alarm and might be a good temporary fix before seeking professional assistance. Remove the control unit. If you pull out the brain, there will be no alarm in the car. However, depending on the way your car alarm was set up, this might disable your vehicle from starting.

Disconnect the negative battery terminal. Turn the key to on position. Reattach the negative battery terminal. Turn the key to off position. Start the car. [9] X Research source

DIP Switches: These are a series of toggles that control how much electricity runs through the sensors. Turning a few off will make your alarm system less touchy. These are built into the main control unit of the alarm system. Rheostat: Using a small screwdriver, you can loosen up a bolt that adjusts the resistance in the sensor, making it more or less sensitive. These sensors are mounted externally. [10] X Research source