Problems with windscreen washer and seat warmer.

Trying to stick to the point here:

I drive a golf MKV 2005 comfortline with a 1,6L engine.

My seat warmer is not working and my washer fluid (main windscreen and rare) is not working either. The front-light washer fluid is working. When i try to use the main windscreen washer, the wiper move as normal, but there is no fluid coming out. The seat warmer and the washer fluid problem occurred at the same time. I have checked the fuses, and I have found none that is burnt, but I'm not 100% sure that I have the right diagram.

Any suggestions to what I can do to isolate the error? If pictures might help, let me know and I will upload.

Sounds similar to a phantom issue I was having. Have you tried checking the wiring that goes up the hood hinge on the passenger side? It's pretty common for those wires to crack/fray/short out and cause all kinds of strange problems on these cars.

Thank you so much, I will be sure to check it out.

For the washer tank, possible one or more of the flexi plastic hoses may be broken leading to a leak. I had that on the GLI before. The flexible filler neck can break too (current issue on R32).