when im turning my car off once in a while (with all my doors unlocked completely) my horn 'beeps'. from what i've read this is the sound telling me my alarm has been armed but my security light doesn't blink? ( a lot of little things aren't working) and if my alarm DOES go off my driver side door lock isnt working to de-arm it. SO, I know you can disconnect factory alarms on S4's ( mines an 88 GXL), but how? step by step instructions would help if any one has them