Hi - one of the usual methods is to train him to go on newspaper in the house and then each time move it gradually nearer the door and then outside. Alternatively take him outside and wait until he does a wee then reward him - he will soon get the idea. There is also a product you can buy now called a 'pee post' - you put it outside where you want your pup to pee and apparently it smells of something that makes them want to pee on/ near it.