Does you're steering wheel sound like its grinding or rubbing? If so the contact ring in side fir the horn is shot. You will need to locate a replacement or rewire the horn. As for the lights, replacement of the signal and hazard switch assembly will likely resolve the issue. with the back wiper, you will want to check to see if it's getting power back to the motor, if not I would look an see if the switch is bad (Most common problem) is power is getting back to the motor, it's a bad motor. You will need a volt meter to see if you’re getting power back to the motor. You can pick them up at your automotive parts center, Sears, Wal-Mart, or any home improvement center. They run anywhere from 15 to 300 dollars depending on what you want it to do. Hope this helps. Thanks.