help i put in a stereo and my tale lights went out

[kodyb]

hay i just got a nissan xterra 2004, and i got a stereo and subs,
when i was wiring it there was no extra wires and i did no tuch eneything i shudint have, no wires are exposed and all covred right when i installed the head unit.

olney thing was there were two ground wireds and thay olney worked when the key was turnd, i connected each one sapterly and togather to the stereo black ground wire, but the problum still happens,



the problim is that i have no tail lights or dashbord lights i have the overhead lights and my headlight. and my sig lighter works too. i check the fuzes and they are all good or is there a hiddin fuze box or something or...im soo lost. HELP

pizz tell me if you need enny more info

thxxxx a bunch