There is a lot of misinformation concerning the consequences of refusing a breathalyzer test, but the law in New Jersey is clear: you must take the test or face stiff penalties.
On a first offense, refusing a test can result in license suspension for 7 months to a year, up to a $500 fine and 12 hours in an Intoxicated Driver Resource Center Program. To convict someone of refusing the breathalyzer test, the State needs only to show that the arresting officer had probable cause to believe the defendant operated the vehicle while intoxicated. However, it is possible to be found guilty of refusing the test even if a defendant is acquitted of driving while intoxicated.
In fact, just recently a Hoboken police officer was charged with refusing a breathalyzer test, adding to his legal troubles that include a DWI charge.