Judge Harvey said both sides had been critical of each other's witnesses.
"It is for you to decide whatever you accept or whatever you reject.
"It is open to you to accept some parts of what a witness has said, and reject other parts. You must come to your verdict solely on the evidence that has been put to you in this court," he told jurors.
He instructed them not to let their own personal feelings of prejudice or sympathy towards anyone involved in the case influence their decision.
"Recognise your personal feelings, and then put them aside. Decide the case in a calm and dispassionate fashion."
He told jurors not to be influenced by the fact Ranger had not spoken to police or given evidence in court. That was his right and he was entitled to remain silent. The onus was on the Crown to prove Ranger's guilt - not for Ranger to prove his innocence.
"Nothing negative is to be read into that fact at all," he said.
Judge Harvey told the jury their job was simple - to judge the case based on the facts, and to decide beyond reasonable doubt that Ranger was guilty. If they could not do that, if they had any single doubt at all, they must stop there and acquit him.
He also explained the legalities of self-defence and the use of reasonable force.
Ranger looked nervous but relieved as the jury left court to deliberate. He has been supported by his partner, parents and friends in court this week, as well as Northland rugby players and coaching staff.
