My 1999 lincoln town cars power windows(to include sunroof) and radio do not operate, changed fuse, but as soon as i turn the key, the fuse blows. any help? thanks

Check the fuse on the bk of the radio.... if it is an after market.... as for the window get a tester and check to see if there is power going to the window... cause it Sounds like a bad fuse... maybe one that doesn't look burned out but is

has direct short in wiring or internal direct short.

THE ACTUAL RADIO IS IN THE TRUNK. BE SURE IT HAS POWER AND IS PLUGGED IN

need to check the wire harness for shorts

The headlight wiring and radio wiring is getting in contact and causing the short.Both the grounds needs to be checked.Because when headlight is off,the radio work's fine.As soon as the headlights are turned on,the radio goes in scan mode.Its clear indication of radio and headlight wiring issue.The wiring's are getting in contact with ant metal surface or both the radio and headlight wire are coming in contact,where they should not.I suggest you to check the headlight and radio wiring diagrams for your lincoln town car.Here is the direct link.Click the link below :---Check out all the 3 links one by one.Radio wiring diagram for 1997 LincolnTown Car?http://technoanswers.blogspot.in/2012/02/radio-wiring-diagram-for-1997-lincoln.html
----------------Lincoln Town Car Radio stereo wiring?

http://technoanswers.blogspot.in/2012/02/lincoln-town-car-radio-stereo-wiring.html
---------Headlight wiring diagram for 1997 Lincoln Town Car?http://technoanswers.blogspot.in/2012/02/headlight-wiring-diagram-for-1997.html
----------This will help.Thanks.

15 amp fuse, number 6  on fuse panel 
find the cause of why the fuse was blown. other wise it might just blow out again

1999 lincoln town car park lights keep blowing fuse

need scan tool goto advance auto parts and borrow one

Fuse blown - look for the one with the key symbol it powers windows/locks/interior lights/sunroof operation. Then work out why it blows...could be anything on the circuit so check a lock isn't sticking on/off when operating the central locking.

best advices would be to check your fuses in the cabin or under the hood.

or

your grounding cable from battery or chassis is either loose or corroded. check your battery terminals and make sure they're clean. i had the exact same problem when relocating my battery from the front of the car to the trunk of the car. my ground cable was loose and the electrical circuit didnt seem to be going through the cycle.