997 GT3 fuse problem

[RT3]

Hi

I just replaced the battery on my 997.1 GT3 it had gone flat over the winter even with a trickle charger on. Now the fuse which does the alarm and sports chrono keeps blowing as soon as I put a new one in, it's fuse 3 in row B it's 15amp. Has anyone had this problem before or any ideas?

Thanks