My AC and heat are stuck in defrost mode I followed the vacuum hose and it was cracked when I try to fix it it broke off at the firewall. I built a new line however I can't see where it enters the cabin. I have read that you need to remove the passenger side airbag to see where the line enters the cabin. I'm wondering if that is true and is it safe to take the airbag out and reinstall. I am aware of all the safety issues. Ie. Unhook the battery for the car. And make sure there's no residual power in a car before proceeding to unplug the airbag or messing with and treated like a bomb because that's what it is. If anybody knows of an easier way to get at the inside firewall I would appreciate any advice.