Water In Trunk

I Have A 2000 Sable Ls And There Is Water Getting Into The Trunk Somehow...the Trunk Seal It Self Is Good. That Was The First Thing I Checked Out...but Its Good....the Water Is Piling In The Spare Tire Well....i Learn About This Problem When I Had A Sound System Put In My Car And I Dont Want The System To Get Ruined By The Water....the Water Was Around An Inch Or 2 Deep...i Had The Guy Pull The Pug Out And Put It Back In...are There Any Ideas On Were The Water Can Be Coming From....let Me Know Thanks.!!!

Check the seals around the lights and window. Is the carpet wet? If yes, where? How did you check the trunk seal?

the carpet isnt really wet the water is in the whole here the spare sets in...and a little water builds in the little plastic trays...the way i checked the seal was by a visiual scan...i know i should have someone in the trunk and spray the trunk but i havnt done that yet....thats bout all i can think of....if you have any more question just ask..me ill try my best to answer to help answer my question..