Need some engine buildup help

today it was ok out and i checked under my dash. i looked at the main harness and saw that it looked like a wire was melted to other wires :silent: :cwm10: it really sucks i found out the aftermarket amps guage works, but the factory temp, amps,gas,oil pressure dont work, id like to get them all to work. first off i take it i'm going to have to 'delete' the bad wires (cut them out, replace) then where should i start to get my guages working mainly gas first off, check ground and such i think i know how to fix that, what about the others? thanks guys :drinkers: happy st pattys day(just got home 5am :thumblef: )haha