I was trying to make a "simple" repair yesterday to supply constant power to my radio. instead, something went terribly wrong. Thanks in advance for any advice.
 
WHAT I DID
* opened the top of the dash by removing the old ashtray, to have visibility to the top of the radio and locate power supply.
* also lowered the glove box all the way to get access from passenger side, lower end of dashboard. 
* opened fuse box cover near driver's left knee to see which one powered radio
* removed two screws holding fuse box in place to get a view of the backside to see if I could locate where the radio power line was connected to fuse box.
* I couldn't find the corresponding radio power supply line on the back of the fuse box, so gave up and re-attached the fuse box.
 
WHAT HAPPENED
* after I did this, the following components no longer work:
- headlights (though running lights, break lights, blinkers and hazards work)
- both power windows will not go up or down (and are stuck down)
- windshield wipers
- front and rear heating fans
- radio
 
I assumed that something got disconnected in the course of my work, so I again removed the fuse box to see if something obvious had been disconnected. I could not see anything after exploring for at least 5 mins, with the help of a flashlight.
 
the car starts and is otherwise drivable, as long as it's not dark and does not rain.
 
Any advice? 
 
thanks