Misbehaving Horn

When it is cold and I start my car the Horn blasts a few of times and the Hazard Lights flash a few times and stops once the car is going. The amount of times depends on how cold it is. What should I be looking for to fix this problem? The car is a 95 kia Sephia. It has an "anti-theft" mechanism that is supposed to cause the horn to honk and the lights to flash if the stereo is ripped out. I think it has got to be linked to that but why does it happen only when it is cold?

Thanks.

check the wiring.

You can try and pull thefuse to the stereo. If the security system is wired through the same circut, this should remove electrical power to it. If the problem stops, you have found your culprit. Make sure the security system does not have its own fuse. If it does pull both. Put the stereo one back in first. If the problem persists, it is the stereo. If it ceases, it is the security system.