Nowadays, in the domestic market, equipped with daytime running lights are the basic of imported cars, and many of the domestic auto fancier uses a self adapted, with daytime running lights. Although there is no change in the installation of car circuit, but for the vehicle distribution brings safe hidden trouble, and in testing time, also need to tear down the daytime driving lights, otherwise it will be deemed illegal modification, pass the inspection process, therefore does not recommend that the owner to installing daytime running lights