Hey all, i just helped a mate install a new cd stereo in his 94 lancer and now his dash lights wont work. I've been trying to get hold of some wiring diagrams however with little success. Could someone please direct me as to where i may find the necessary wiring diagrams, or give a possible solution to the problem... I also noticed whilst installing the stereo that there was an extra wire coupled with one of the speaker wires (not the illumination wire) whose purpose i cannot determine, is this the source of my issues or rather what is the purpose of this unaccounted for wire?

Thanks