Ahh thanks a lot guys! After reading here...
I took the glove box off, 4 large 10mm screws and one reguar screw
Great location for a fusebox... The Driver kickpannel fusebox cover said that the fuses are somewhere there. I pulled all the small plastic peices off

(i have an EXTRA driver fusebox cover for some unknown reason, if anyone wants it)
Theres 2 fuses One large 30Amp and one small 10AMP.
The 10 AMP for AC is burned out, i replaced it with an old extra one (that was lying in the glovebox from the previous owner),
Now the AC TURNS ON and then OFF after a second or two...
The 30AMP fuse seems to be ok but the copper one is all green, i guess it oxided.

I think this one is the culprit?
I will replace both tommorow and try it.

I also left the lights on again and killed the battery