05 pacifica wont start with key

I haven't checked that.  All the lights, heater, ect. comes on when I turn the key on so I didn't think it would be popped.

check the fuses like splaudio said. i had the same problem once and somehow a mini spade 30amp fuse popped under the hood. it was a fuse that i would have never thought to check.  check the main power wire at the ignition harness. if there is nothing there, run a fused wire directly from the battery to the power wire and try starting it. if it starts, you know its just a fuse you have to find. the ignition and acc wires are on their own circuit so if a fuse pops on the main power wire, the lights, heater, etc should still come on.