How do you turn the security system off an 1986 Cadillac Eldorado?

To turn off the security system on a 1986 Cadillac Eldorado, locate the security system's reset switch, usually found under the dashboard or near the steering column. If equipped with a key fob, press the unlock button to disarm the system. Additionally, you can try inserting the key into the ignition and turning it to the "On" position without starting the engine to reset the system. If problems persist, consult the owner's manual or a professional for assistance.