Door ajar light on when it rains

[Mrafferty]

My 2019 Laramie Longhorn shows door ajar when it is even slightly raining. Dealer replaced BCM didn’t resolve the issue. Dealer replaced driver door window rubbers and door handle gasket and still the same issue. Please help!

 

[LaxDfns15]

Check your back window and third brake light. That's where water intrusion happens the most and can cause all kinds of issues. I added an extra gasket to my third brake light and recently just replaced it after a few years.

 

[Mrafferty]

If I replace the driver door latch myself do I have to have the dealer flash the computer on the truck in order for it to recognize the new door latch?

 

[LaxDfns15]

Not sure on that one. If it's just the latch and not the handle or anything that recognizes the key I would assume no.

 

[Mrafferty]

So I’ve replaced the door latch, replaced rubber gaskets around the driver side window, replaced the third brake light gasket, checked rear window and replaced Body Control Module and still the slightest amount of moisture and it thinks the drivers door is open! I’m at my wits end!!!

 

[Reverse]

wiring between body and door?

 

[Mrafferty]

Took it apart and applied die electric grease to each pin in the connector

 

[Mrafferty]

Is there something else on this circuit?