Probable cause means the officer has a valid reason to believe you committed a crime. One way to establish probable cause is to administer a breathalyzer test. A breathalyzer test uses a small, portable device known as a breathalyzer.This device has been approved for use by the National Highway Traffic Safety Administration. For the breathalyzer test, the officer will ask you to breath into the device.efusing the Breathalyzer Test. The consequences of refusing a breathalyzer test can be severe depending on your state's laws. If you do refuse to take a breathalyzer test, you may have your license automatically suspended from 90 days all the way up to a year.