Two areas of possible fault should excessive play be felt in steering wheel?

Not knowing the year or make of the vehicle in question, the answers I give are only generalizations. There may be excessive play in the steering gear box which requires a new gearbox to be installed. There may be need to replace the tie rod ends and relay/control arms. Check the pittman arm for excessive play. Check for loose wheel bearings, a complete inspection of the front end components would be advised.