I`ve got an icecap660 that powers four 36 inch VHO`s. I replaced the bulbs with exactly the same type bulbs thay were in it and now every time I plug the lights back in it blows the 7amp fuse in the ballast.I tried putting the old bulbs back in and got the same thing.I even tried it with no bulbs and it still blew the fuse.Maybe a bare wire somewhere that I can`t see or the ballast went bad?Is there a way to check the ballast to make sure it`s still good?I figure if I can be sure the icecap is good it`s got to be in the wiring harness.Any electrical guniuses out there that can tell me the easiest way to track this down?