Security light on - 2000 Oldsmobile Intrigue

check that it has power at the coil ,crank sensor,etc. with a test light when cranking it over.

If the Security Light is on but is not flashing, the security system is fine. If the security light is flashing then turn the ignition key to the run position (do not start). Wait over ten minutes and then try to start the engine. After the ten minutes you should notice that the light stopped flashing. If the engine starts then you do have a problem with the Passlock Security System.

Security system is tripped. Dealer will have to reset it.

The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterperates this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. Remember too, the TDM controls the security light. Sometimes you can have ALL the symptoms and no lights.
This link may help you.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Here is a link that will help with the SECURITY light.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

The gears locking up is a completely different problem. Unrelated to the security issue.

I have no idea on the horn problem. Maybe loose wires in the wheel or steering column. The SECURITY light is another problem all together. Here is some info on the security.

The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. These 3 parts are in CONSTANT communication. If the key is in the ignition, these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

The security system may have something to do with it. The system sends a signal from the key to the i/p cluster, then to the ecm to allow the fuel injectors to operate.

Is the security light on when you try to start the car and leave the key in the run position? Does the security light flash when the key is left in the run position after you try to start the engine? If so, let the security light flash until it stops, turn off the key for 30 seconds, then try to restart the engine. If the engine starts and the security light stays off have someone get the codes out of the security system and have it fixed properly.

disconnect the +battery post with an 8mm socket and leave the thing off for 2 minutes.reconnect it.

no you might need to replace the ignition switch

Everything you need to know is on this link

http://vatspasslockpasskeysecurityhelp.yolasite.com/