Problem with 2000 P71 Crown Vic
Im having an issue with my 2000 p71 crown vic. Last tuesday the battery light came on, the voltage was low. I looked at the battery and it was over 3 years old, so i go to autozone and buy a new one. Put it in and everything is good. Friday while driving on the freeway the radio goes off, and the battery guage is real low, so i kill the a/c amd keep driving. I get 3 miles to my destination, turn it off, try to restart it and it wont start. Just a click, click, click from the starter. Come back out 3 hours later and it starts, but the check battery light is on and the guage is low. I start driving and the speedometer starts bouncing all over, all the light on the cluster like low fuel, abs, check engine come on. Then the car gets real week, no power. Battery guage is real low. Not even enough juice to use the electric windows. It almost died waiting at a red light so i throw it in park and rev it so it wont die, then i smell a burning smell. I get back to work, park, and it dies. Wont restart, just clicking. Tried to jump it and nothing. Took the 3 day old battery to autozone and they tested it, machine said bad battery so i got a new one. Put it in and the car is good again. Yesterday when i start it the check battery light comes on for a second then goes off. Same again later when i start it again. So i go by autozone to check the alternator and there machine either wont pick up the rpms from the car to test like somethings wrong with my car or there machine manages to break at that very moment of trying to test it. Today i start it and the check battery light comes on for a few seconds, i rev the motor, and it goes off.
What could it be alternator? There is no spark at the batter like there is a short somewhere. Why would the guages go crazy and the car lose power?
Any help is appreciated.