Water Getting in from Passenger A Pillar

[Daw14]

I would stay away from silicone, it is temporary. If you use the search for our site search third brake light m-d This is the brand Home Depot has and a bunch of us have had success for over a decade. You can find a close size , but some trimming is required. Put the joint on the bottom if it’s not shown in the search .

 

[SitKneelBend]

I would stay away from silicone, it is temporary. If you use the search for our site search third brake light m-d This is the brand Home Depot has and a bunch of us have had success for over a decade. You can find a close size , but some trimming is required. Put the joint on the bottom if it’s not shown in the search .

This is what I have had on there for nearly ten years now...

https://www.homedepot.com/p/M-D-Building-Products-PLATINUM-0-375-in-x-17-ft-Brown-Silicone-Rubber-Window-Seal-for-Ex-Large-Gaps-Weatherstrip-Roll-43848/100353450

 

[David H]

Pretty sure this is the stuff from HD.

 

[Sauerwal]

Thanks again for all the suggestions! I will work on that this weekend.

 

[Grams]

Thanks but I'm not sure what you mean by the "high mount brake light isn't a thing" Can you clarify, please? Thanks

The “A” pillar are the ones at the left/right of the windshield.

The “high mount brake light”…(CMHSL) ….is above the rear window. They have been KNOWN to be a problem since the early 2000’s.

Rain and Car-Washing will get behind that CMHSL with a poor gasket and leak into the cab… soak the headliner and soak the carpet behind the rear seat and contribute to mold/musty-smell.

Re-Seal the SHMSL. (Butyl tape, such as used on RV’s and such works pretty good.)

If water is coming from the A-pillar…it’s most likely due to a leaking windshield gasket…but if it IS due to the CHMSL then it must be somehow being “channelled” around the headliner…. pretty difficult for me to imagine.

 

[mtofell]

Pretty sure this is the stuff from HD.
View attachment 575563

I bought my truck new in March of 2014 and within a few months my 3rd brake light went out. Pulled the cover and it was full of water. I called the dealer for warranty and they said they were aware of the problem but had no fix yet (seriously?). Got the exact product you picture and cut a strip to go around the top and down the sides between the lens and truck body (throw out the POS factory "gasket"). 10+ years later and my fix is still working just fine. The bulb actually failed again recently (10+ years later, presumably just due to age). Went to change it and it's dry as a bone and my repair that Ram apparently couldn't figure out is still holding strong

 

[SitKneelBend]

I bought my truck new in March of 2014 and within a few months my 3rd brake light went out. Pulled the cover and it was full of water. I called the dealer for warranty and they said they were aware of the problem but had no fix yet (seriously?). Got the exact product you picture and cut a strip to go around the top and down the sides between the lens and truck body (throw out the POS factory "gasket"). 10+ years later and my fix is still working just fine. The bulb actually failed again recently (10+ years later, presumably just due to age). Went to change it and it's dry as a bone and my repair that Ram apparently couldn't figure out is still holding strong

Agreed, I've had mine in/out several times changing bulbs/adding cameras with the same window gasket from home Depot installed. It's a lot thicker but very compressable making a good seal (I did leave a tiny opening at the bottom to weep though)

 

[mtofell]

(I did leave a tiny opening at the bottom to weep though)

Same... I just ran mine across the top and down the sides. If water's raining in the bottom I've got bigger problems than a brake light

 

[Hanover Fiste]

If water is coming from the A-pillar…

In my case, it was because of clogged sunroof drain tubes where the water exits.