Car Alarms: Car alarm/vehicle horn, car alarm system, viper model

Question
QUESTION: well the alarm has been installed for a number of years now.it is a viper model 5000 car alarm system that is installed in a ford expedition 2003
Answer:     I see, yes the relay application would work for that alarm.

thanks for answering my question about the car alarm/ vehicle horn. Now I need to know what part do I order from disarmalarm.com  to work with my alarm system

i recently purchase a relay and socket to wire to my horn and alarm. I'm having problems identifying wire for horn. I looked around the steering column area and I see a large blue wire that has a strip on the side and there are smaller blue wires. The blue wire on the socket is rather large.

Answer
It's a dark blue wire. Best way to make sure it's the horn,
take a simple test light, not a multimeter.
Ground the clip to a good metal spot and probe the wire.
When it receives the ground from the test light,
the horn would honk.

There ya go.

ALARMTEK