97 Jetta E-Brake/starting probles, please help

[Coppenrath]

I have a 97 standard jetta. I bought the car used two years ago. When i turn on the car, sometimes the emergency brake light stays on dimmly, and there is a slight hissping like noise coming from the engine. I then turn off the engine and restart the engine and all is fine. I just had the starter replaced, and the problem remains. This problem only seems to occur durring hot weather. When the sun goes down durring the summer, this does not occur at night. Does anyone know why this is happening and what i can do to fix it?

Thanks,
Mike

[Coppenrath]

More car info
97 Jetta
Man. Trans
2.0
Just had Starter Replaced
Rear Defrost Does Not Work
Fan Does Not Work when Problem is occuring
There was an Amp used by original owner- Someone else posted the same problem with the car on another message board, and said that they had the problem after installing an Amp.