ive barebacked wire for ground before.. so thats not the problem.. unless its a bad ground spot..
i would check your head unit..
take your volt meter and put it on dc volts and play a song with the woofers not attached.. check for dc voltage coming out of the amp.. dc volts = bad
then swap to ac volts and see how many volts its putting out.. if any..
double check the ohm load coming out of the box.. if its still 2 the woofers would have to be dual 2 ohm woofers
if they check out
take a 9 volt battery and run it to the terminal on the speaker box.. positve to positive and neg to negative.. keep it on there for a second. only long enough to see which way they move..
if one moves in and one moves out.. theres your problem.. if they both move the same way. well then your sol lol