passenger side lights wont work

my 04 hyundai tiburon is jacked up, for some reason my passenger side headlight as well as tail light and speedometer lights wont come on, i previously posted this problem but i left out that my tail light wont work, i've checked all the fuses inside the cabin but none are blown, the only thing that i can think is that when i tried to hook up my tachometer and sliced into my rpm wire that it may have messed up my crap but i dont think that splitting the wire should matter because my rpms still work fine even though i dont think that the wire i hooked it too was correct, someone told me the rpm wire was in the passenger kick panel on a 23 pin plug and the 4 white wire? i have no f*ckin clue man, i just need to get my damn car fixed so that i can actually drive it at night time w/o getting pulled over! im desperate... if someone knows anything plz help!!!

Is there a fusebox under the hood?

yes but they have covers and dont screw off and i cannot pull them off for nothing 

and the diagram on the underneath of the box top doesnt have any distinct description of like your left or right side light/tail lights