Found the problem, thanks again guys for responding to my issue. It was the BST cable that tripped. After inspecting the positive cable connecting to the battery, I noticed a yellow tab loose, hidden under a tiny red cover on the BST. I fiddled with it and heard a snap and all of a sudden all my interior lights came on. Have no idea how it tripped and I'm not going to do any further investigation on it; everything works now. Again, thanks for the help.