F-Body07

ok well here is the story. i wreaked my c5 in march. i bought a new frame and put all my good parts on that one. I got it running with out any problems. Exept my heater doesnt work. i pluged in all the wires under the dash, but there are 3 wires that i couldnt figure out where they go. i tried finding were the go...im looking everyday for the passed month... but i cant find nothing. its grtting me mad... i can build a whole car but i cant figure out a dang heater.