refrigerator noise

unplugged refrigerator, unplugged fan motor under fridge, unscrewed four metal screws holding fan support, took support and fan out together, unbolted fan from support frame, reversed procedure to reinstall then cut both red wires and both white wires, fan comes with only two wires so i connected the two red wires to one of the black wire, and connected two white wires to the other black wires, used connectors in hardware package to secure connections, turned refrigerator back on, worked perfectly, fan installed in bracket support perfectly. just want to point out that the fan motor does come with a fan blade and hold down screw so those items don't have to be purchased seperately.