My opinion is that the problem is a fuse but after the replacing of it check the real cause of the problem in the way that i'll tell you: replace the fuse; check if you cannot smell an odour of burned wire;turn on one by one the consumers : lights, then wipers,and so on. Then at the moment that the fuse burns youll find the problematic part. Mantain 6 or 8 seconds between each swich.