Start by removing the two screws holding the brake light to the cab.
F150 3rd brake light leak fix.
The only part required is a replacement gasket.
After trying 2 new 3rd brake lights i determined it was the seal on the window that was leaking.
Once you do this.
Unscrew the two mounting screws visible on the front of the old brake light.
Does your back window leak in your f150.
4th gen ram trucks diy 3rd brake light leak fix duration.
The fix is simple and will only take about 20 minutes.
Removing the brake light.
Lift the housing away and twist the light sockets out of the brake light housing.
Fixing an f 150 third brake light leak replacement gasket.
I bought this peel and stick variety and it worked.