fuse keeps blowing
 

i have a 98 deville, and i was wondering if anyone has had this problem the power seat fuse (well i guess it a relay) keeps blowin. the first time i replaced it it worked fine then one day it just popped. the only other thing covered on this relay is the horn.so any help would be thankful. im a first time ower of a cadillac so this is new to me.