After I washed my car and wheels two days ago, my ABS and TCS lights went on (while I am driving). When I took it to a mechanic, they checked everything and took my car for two test drives--and found nothing wrong with it. As I am driving it home from the shop, the lights turn on again, the AC stops and now my radio turned off and won't turn back on...please help!

You happened to choose the wrong mechanic(s). How much did you pay them for not doing anything to help you? I can't figure out myself from my position what your problem(s) might be. You need to report those mechanic crooks to the BBB of your city (they DO claim to operate a bonefide business, don't they?) and ask around to find a good, reputable, recommended garage to take your auto to.

Good Luck!