I am not an expert on jeeps, but have lots of experience chasing water leaks on vehicles. Here are some of my suggestions and observations.
Most vehicle manufacturers channel the water away from area of potential leaks so spraying high pressure to find a leak is misleading. With that said here is how I go about finding leaks. I know you have a good idea of where it is coming from.
Start with someone in the vehicle with a flashlight shinning the light around the jam see if you can see light outside in the seal area. With someone inside the vehicle have someone just run water over the vehicle. Start low at the bottom hinge area and move up slowly. This allows you to look for the leak in small areas to isolate concern. When you identify the leak area, inspect that area for obvious concerns (torn weatherstrip, hole in metal, screw missing) if you isolate it to the door weatherstrip as you indicated there are a couple ways to check the seal. There is a spray tracing powder you can spray on the weatherstrip, then shut the door carefully and push to engage the secondary latch. When you open you can see the witness mark we’re the door sealed or not. I prefer the dollar bill method, put a dollar bill in and. Close the door on it. You should have resistance pulling it out. This will check a few inches at a time. It won’t work in the corner but you can test the top and front right up to the corner.
On your vehicle your door looks low, seems someone put a washer in the hinge pin to raise the door. I would pull the door off and inspect the hinges. The top also looks back to me but it could just be the seal you have up there. Check the windshield to the cowl to see if it is all the way back. The doors frames also crack at the rear where the door meets the window frame. This can cause the top not to seal. Here is a picture of my door to top gap.
Sorry it won’t let me attach a file right now. I will try in a bit.
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