Water in the trunk (Yaris 2003)

[BartSimpson]

Hello everyone,
I have seen some similar posts, but my case looks slightly different. This is why I am opening a new topic.
I have a leak in my trunk. I found it out when Iooked under the boot floor cover - there was water in the spare tire bay and the left side of the floor mat was wet. I replaced the left taillight gasket. 
It does not leak that much now, but the problem persists. It does not leak from the under. There is a sunroof, but I do not think it leaks through there.
It leaks only when I use a hose and spill the water on the hatch.
The hatch has 2 metal sheets welded from inside - it somehow leaks through there. 
https://www.youtube.com/watch?v=yHLlXxZCwgg
Any ideas? Change the taillight seal one more time?

 

 

 

[FROSTYBALLS]

Could it be from the rear light clusters (seals) - which is a common source of leaks on some other models (eg Aygo, Auris).

[BartSimpson]

Hi,

Unfortunately, this is not the reason in this case... When I spill the water directly on the rear light it does not leak. It leaks when I spill the water above the rear light, at the top of the hatch.

Can someone help: when the leak is from the tail light - where does the water come out? Is it clear the leak is from the lights?

[FROSTYBALLS]

When you pour water on the top of the hatch, some will run down the gutter either side of the opening. If the seal of one or both of the rear light clusters has perished with age, water could get past the seal/s and leak into the boot. With the tailgate open pour some water into the gutter at the top of the opening and see where it goes.

[BartSimpson]

With the tailgate open the water goes the same way as in the video I attached:
https://www.youtube.com/watch?v=yHLlXxZCwgg

So still leaking from between the 2 metal sheets clearance.

[lani100]

Common problem on the Yaris,  I ran a smal bead of silicone sealant between the light and the car.

That did the trick for me.