I had a water problem in my trunk and it would get soaked inside there. What I did is I got in the trunk with a flashlight and my wife srayed the water hose on the back of the car and my problem was found. It aws coming out of the vent behind the carpet on the wall. The foam or rubber seal had moved some how and it was allowing water to just pour right in. A little silicone fixed my problem 
1999 Contour SE Sport 39,xxx Miles
20% tint, Yokohama AVS tires 205/60/15
Aiwa cd player
1988 Ford F-150 4x4
31/10.50/15 mudders
2 10" Subs, Clarion Cd
Roll pan, bed cover, black outs all 4 corners
5% tint,Dual flowmaster's, K&N filter
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