water in trunk

my 1994 taurus wagon is leaking water in the trunk,it is not coming in from the gasket around the tailgate,does anyone have any ideas???

geT YOUR FLASHLITE,OR TROUBLE LITE, GET INSIDE TRUCK, HAVE TRUSTED FRIEND START AT THE LOWEST SIDE AND WITH A WATER HOSE GO ARUND THE SEAL AREA, TAIL LIGHTS, AND LOOK FOR THE WATER POURING IN.
sTILL NO LEAK, THEN START AT THE BOTTOM OF THE REAR WINDOW AND SEE IF ITS LEAKING THROUGH THE GASKET SYSTEM THERE.
uUSALLY EASY TO FIND THIS WAY!!