Can you get convicted of a DWI if no breathalyzer test was administered?

Indeed you can be convicted for DWI, regardless of whether or not a breathalyzer was used, if the Police officer that stopped you had reason to be suspicious of you being intoxicated while driving; ie: you were swerving or driving really slow, then proceeded to pull you over and could tell you were drunk by possibly your actions either verbal or non verbal they can bring up charges in the court of law and have a reasonable case against you. I wasn't there but if you actually were DWI it was probably pretty obvious to the officer so I would save your self some time and plead guilty. Good luck to you anyways.

The above is the most ridiculous answer I've ever heard. ANY defense lawyer specializing in drunk driving cases would be able to get you off if there was no breathalyzer nor chemical test done to prove intoxication. Without these tests the definition of intoxication would be at the whim of the arresting officer. "He looked drunk to me."