Water leak at high mount stop light on Ford F-150

Average mileage: 79,438 (5,000–256,265)
4 model years affected: 2004, 2007, 2009, 2010
17 people reported this problem
8 people shared problem details
2007 Ford F-1505,000
this is the second f150 I have had with this problem. the first they replaceed the window 3 times then the cargo light assembly then i got fed up and brought a 2007 f150 only to encounter the same thing.I will not buy another Ford
2010 Ford F-15060,000
Leak was noticed during heavy rain @ the passenger door hand hold, Later noticed @ the 2 rear corners of the back window. Investigating Repair.
2004 Ford F-15040,000
Mine did this too. Dealer replaced the gasket at the third brake light and the gasket for the whole back window. 6 months later (and after warranty expired) it began to leak again. The replacement of the gasket for the back window never did correct the whole window assembly from shifting and squeaking. Only leaked during extremely hard rain or in a car wash but a steady flow of water leaked in each time.
Water leaks that appear at the headliner and rear seat area have been known to be coming from the rear high mount stop light. The gasket that seals the light becomes warped over time and allows water to enter through the stop light into the cab area. A revised stop light is available, but I have found that properly placed caulk or foam tape will work also.
2009 Ford F-15018,000
Dealer diagnosed and repaired under warranty.
2009 Ford F-15059,000
water leaking into the cab at top right rear. Noticed it during a monsoon rain storm as it dripped on my dad in the back seat a month ago, then yesterday after terrential rains again the headliner is wet and stained, truck smells of mildew.
2004 Ford F-150256,265
Leak in the back, tried sealing it with some sealant bought at advanced auto parts.. one place i didnt try was around the high mount stop light. gonna try it and hopefully fixes it.
2007 Ford F-15075,000
Water leak / condensation at third brake light.
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