Yes the numbers are written on the top of fuses (also 15 amp ones comes in blue color code if I remember correctly).
Check the top of the fuse box, the numbers are also written over there, you can count from there also. Seeing that you will get the idea which ones are first and which are last (towards relays).
Yes these ones are in the engine bay, black colored box right above the battery.
The fuse box in dashboard have a sticker there at the back of the cover mentioning which fuses are for which function (like ABS etc.).
Do give the fuses a check yourself in lighted area, you might have a burnt fuse that needs replacement amongst the two I mentioned.