when you turn the key to run (don't crank it) does the immobilizer key blink a few times then go out? or does it keep blinking?

it's possible they damaged the immobilizer unit and/or wiring while they were tearin your equipment out...might have been almost inoperable but still worked initially, and on the ride home the vibration finished it off?

seen this a number of times here at work from bad alarm installs. you'd think on one of the most popular car models out there that these install places would know their wires by now :doh: