First of all, I have a 2002 PT Dream Cruiser. Last week I started to hear a whistling sound whenever I got up to 45mph. Now I've noticed that it squeaks when I first start the car up & go at slower speeds, then when I get to the 45mph it whistles. A few days after I heard this, all of a sudden the door locks didn't work & no fuse is flashing on the dashboard. I changed the fuse for the door locks, but it didn't work. Any idea what could be causing this problem?