my cars battery keeps draining i was wondering if unplugging the old alarm can cause it to drain the battery draining started when i unplugged an alarm and tried to install a new alarm i undid all the stuff from the new alarm
unplugging the alarm will actually make the battery last longer, you likely unplugged something else when you were messing with the alarm or it may just be time for a new battery or alternator. Most autoparts will check both for free.
that should not be the root cause for your problem.