I recently changed out the ignition switch and in doing so, disconnected the battery cable for the airbags. When I reconnected the battery cable the alarm activated. I don't have a remote alarm fob. Does the alarm deactivate the starter so I can't start it, or did I do something wrong changing the ignition switch?
Based on which alarm you have, it could prevent the engine from starting. Check to see if you are getting spark and fuel to the engine. As far as the alarm, it should reset itself after a minute or two.