Sounds like you may have 2 seperate problems, but both also go thru the BCM(Body Control Module), so you may have to have the Dealer Check the BCM alsoHORN:Check the BLACK/RED (-) wire at Steering Column Harness. When you Press the Horn, BLACK/RED (-) wire should show Ground. (also, probe the wire with a Test lite to activate Horn) If horn works, then it is probably Clock Spring. If horn does not work, then it is the Relay, Horn or Voiltage(fuse).
WIPERS:Be sure there is Power to Wiper Motor.Usually the Wiper Switch fails.