Pontiac Repair: 96 Bonneville blown fuse, blown fuse, fuse box

Question
What could be causing the fuse for the tail lights/instrument panel (I believe it is fuse 6/C in the fuse box) to keep blowing?  The wiring in the trunk to the tail lights look solid with no wear or apparent shorts.  I get a fast chime when the door is opened and ignition switch off indicating that headlights are on.  This chime goes away briefly when I replace the fuse.  Returns when the fuse blows.  Someone has suggested to me that the problem could be in the rheostat of the headlight switch?  Is this possible?

Answer
Hey Bryce:

No the headlamp switch is not a likely cause. short ckts are really hard to find especially if they are intermittant. Sound like yours is a dead short. fisrt and foremost has anything been done to that car recently and then after that the fuse issue has cropped up? If yes look there first. If not I would suggest getting a good repair manual and atek a look at the parking light ckt to see what is on there and where the harnesses run. You Can stop into a dealer and if you get someone who cares they can make a photo copy of the wiring diagram for you to look at. Soory I can't be of a lot of help but these things are really hard to find espceially a ckt that has a lot of branches like this one does. Good luck :)