Does your back window leak in your f150.
F150 third brake light leak fix.
The most common fix that people seem to do is to permanently seal the third brake light assembly to the back of the cab with an adhesive such as glue or urethane.
Start by removing the two screws holding the brake light to the cab.
The fix is simple and will only take about 20 minutes.
Unscrew the two mounting screws visible on the front of the old brake light.
Examine the foam rubber gasket where you saw bubbles and you may see why it was leaking.
Do not do this.
After trying 2 new 3rd brake lights i determined it was the seal on the window that was leaking.
Fixing an f 150 third brake light leak replacement gasket.
Removing the brake light.
I bought this peel and stick variety and it worked.
Lift the housing away and twist the light sockets out of the brake light housing.
The only part required is a replacement gasket.