i'll have a look aswell. To be honest though, if chase all the wires, check all the connections etc there isnt real a lot else u can do, and if its still not playing ball after that it might just be on its way out.

Ive got the AI606 and thats been there current top of the line alarm for at least 5 years, yours must be a fair few years old, and i expect it had it fitted back in the day when they were the car to steal.

If you get no luck i might be able to pass you a number of someone that can help, i bought my alarm from him.