I need to know what part actually needs to be replaced to repair my wipers.

How would you do that? If the wiper works on the "washer" setting, does that run on a different motor?

I was answering someone else's question and sent to you by mistake and tried to remove sorry. In your situation it is either a faulty wire harness not sending power for those settings or the contact points on the 'stalk' have gone bad and it needs replaced. Need to test the harness for voltage on those settings to see if power is coming through.

Thank you!