I was driving home one afternoon and the radio in my car flashed on and off about 8 times and then stopped. The radio is an aftermarket Alpine CD player. The next day i was driving and pressed the button to roll the window down and the buzzer light on the dash came on, so i had to press the window button several times before it went off. It did this several times on the way home. Any sugestions on where to begin with these symptoms?
Also, my door locks are not locking and unlocking properly, especially when the car is not on. I assumed this was a vacuum problem, so i checked the lines under the hood and everything seemed intact. Is there anywhere else to check?