Hey i bought a stock tape deck for my beater car, a 89 cavalier. I first installed it, and it worked ok, but it had a bracket on it that i needed to take off... I unplugged it, took the bracket off, plugged it back in and now the display wont light up, it wont switch between AM and FM, and all i get it a buzzing sound... When i wiggle the antenna cable it changes the buzzing sound, or kinda skips it. Also wheni turn the headlight switch on or some other devices it also changes the sound... Hop i described the problem clearly, any ideas on what it could be????