The answer is, it depends. Under the law, you have the right to speak with an attorney after being given an Implied Consent warning, and being asked to submit to a chemical, breath, or blood test. However, it is only a 20 minute window before you are required to agree or refuse the breathalyzer, and you may not be told of you right to speak with a DWI defense attorney. But you should absolutely call an experienced attorney at that point before agreeing to the tests. If you refuse, you are automatically given a driver's license suspension for 1 year, and that fact is used against you in court. Many jurors and judges will assume you refused because you assumed you would fail. If you fail, you are giving the state evidence against you that you were impaired, and it makes it that much easier to get convicted of a drunk driving charge. This is a tough decision for anyone to make. If you are very sure you will pass, it is probably smart to take the test. If you are on the fence and might fail, but otherwise might have a good case to fight the charges, and can manage with the license suspension -  refusing the test can make sense.