I don't really know how I did it.
I really mean that, too. I trained Kacee to use pads in the house and to ring the bell to go outside during the day. Then at night and in bad weather we have pads in the attached garage.
I know you'd think she'd be confused, but it worked with Muffin and I figured it would work with Kacee.
I just put the pads down close to the door and started putting her on it and telling her to go potty at night and she caught on and gradually weaned her into using the pads in the garage at night and in bad weather.
For some reason unknown to me they catch on that in the daytime they can go outside. At night she rings the same bell and I just tell her to come out in the garage and she follows me and doesn't think anything of it.
I keep the pads in the house by the door just in case no one can get to the door or no one is home and she'll still be able to go.
She is housebroken at nearly 6.5 months, but I wouldn't trust her with the run of the house. The housebroken puppy wouldn't be housebroken long if I did that. I've had her since she was 6 wks and 2.5 lbs. And I won't until she's around a year or more older.