Did this just start? Had the lights been out, and you are now working to try to get everything working alright?
I had a similar problem with my car, and finally found that the wires in the connectors (in the trunk) were switched! It was grounding out, and every time I put in a fuse, pow, it blew.
or is there a break or some other touch point in the wiring that is grounding out the connections?