<VV> VV Blown fuses

[John Miller]

 On my late model AC car I  seem to keep blowing the stop and istrument light
fuses....never just one or the other both at the same time. This seems to
occur occasionally and once it does it I cannot make it happen again on
purpose with lights on, stepping on brakes, using turn signal.hitting
brights....? Whats odd is it usually blows the dash lights when they arent
even on. But...it does seem to be related to the AC. Because it seems to
happen after I have run the AC for a time. Yet the AC is not affected.
  Sure I know I will get fifty replies saing I have a short....I know
that!...I was just hoping there might be a chance someone has experience
something similar and could maybe guide me to any specific item(s) that might
be a cause. I have examined the wiring and havent found any hot spots or bare
wires, it all looks good. Perhaps an AC relay?
 Any help would be appreciated as I have no wiring diagram.

                                                John Miller
                                                Iowa