tuff5liter

OK this is how i want to hook up the electric fan in my car. Only problem is that its a two speed fan. So my question is this. I just ground the fan like normal, then ground the relays seperate from the fan? Or do i hook the ground for the fan up to the relay. I am wantingto use both speeds of the fan, so i am curious as how i would do this. Could I just use this drawing for each speed. Im not real sure if the relay itself has to be grounded or what. Im kinda new to electricity. Thanks guys.