you would hear a loud thudding noise when you go over a pothole/speedbump etc. This is due to the shocks bottoming out normally because they have leaked all the oil out.
What kind of noise WOULD a cat make?
usualy you would hear rock music
Silence
Bad bearings in an alternator would make a grinding or roaring sound. If a Diode Plate is failing you might hear a buzzing sound in the radio that changes pitch with the speed of the engine.
Airshocks
chimichanga music
Type of noise - scraping, clicking? Type of vehicle? it's neither scraping or clicking it's kind of like a humming sound vehicle is 99 le Sabre
Check shock mountings
a noise why don't you hit it and then you will find out :)
I'd have to say Nike Shocks. ----
There are some unknowns here. 1. Did you shut it off and it made a noise, OR 2. Did the car stop running suddenly, making a noise? If you shut the car off, some quiet noises are normal. You may hear the fuel pump from the rear of the car for a couple seconds, and you may hear a solenoid under the hood for a second or two, or the electric radiator fan after the car is shut off. The other question is what kind of noise was it? A loud bang? A whoosh noise, a scrape noise? Did the engine seem to try and keep running? Please add more detail and I'll try to help.
DO YOU HEAR ANY KIND OF NOISE WHEN HITTING THE SWITCH? HAVE YOU TRIED ANY TYPE OF LUBE? I WOULD ALSO SEE IF THERE IS POWER GOING TO THE ANTENNA WITH A LIGHT TESTER. START WITH THE SIMPLE THINGS FIRST. CHECK YOUR FUSE.