What happens if someone who is court ordered to put a breathalyser in his or her fails a test? Is this a violation of probation? What is the probation officer's next move? Does the test record show the level of BAC or is a pass or fail kind of thing? This is all very to me, because technically many different things can set off a ignition interlock device (or breathalyser). It would seem irrational for a probation officer to revoke an individuals right to probation because of one or two failed test. So, what exactly happens on this occasion? Thanks for your help.