The fuse that controls the headlights and dashboard lights keeps popping on my 99 Mercury Cougar, 110000 miles. An after market stereo was installed (poorly) by the previous owner. I have taped up all the exposed wires, but it still does this. There seems to be no set pattern. It can pop after 2 seconds or take weeks. The last time it was fine for two months and I thougth I had it fixed. Any suggestions?