Need help with integra electrical
 

i have a 94 integra and juss got a sub and amp. after i got it installed, later that night when i turn on my headlights, my guage cluster dash lights and tail lights do not work. i changed the fuse for it under the steering wheel but now it just keeps on blowing the new fuse every time i turn my headlights on or turning the guage cluster and interior lights on. the subs and amp wrk the fan, a/c, radio, etc. work just not the dash, cluster, tail lights.

need help asap on this problem and thanks