[valentinehuang]

Thank you so much for your suggestions. I will work on my car this weekend and let you people know. It is so freezing now.

I will check the wires. Most probably I will buy the positive and negative cable of battery and replace them. I also noticed the short wire pluged into the alternator. I do not how to check whether it works or not. It looks like a control cable with several pins there.

After replace the wire, I will get out one bolt from the two bolt secure the alternator on the engine mount to see whether there is a problem there.

To my understanding, one of bolt is for ground purpose for the alternator, right?

So, I will let you professional know after I made further progress.

I still consider it as a good car.