I think if the wiring that the dealership is indeed burned, you have a very good case when you take it back to the circuit city where you had it installed. If they see burned wires they will pay for all expences in my opinion.

but... the only problem you could have is the starter wire not being properly connected. I don't see anything else causing the problem. Usually if the alarm works for so long without a problem, it doesn't just all of the sudden stop working. The starter kill relay could have gone bad, but that is very very rare.

Not to dispute what Mikealarm said, but Dei alarms do not have a fuse on the red power wire, only on the white lightflash wire.