By the time you spend all the money on the quality different colored wires, various connectors, shrink sleeve, then buy the fuse block and the relays and figure your time, the aftermarket harness isn't that bad of a deal. The last Painless 12 circuit universal harness I bought was about $250.00, by specific application they are higher. Another point, the painless wires are labeled all along the full length of the wire as to which component they go to.