Try a smaller crate, if it's not small already.
Remove the potty pad, and set a alarm at night.
Mid way through the night, take him out to potty.
You may have accidentally trained him to potty in the crate. He's young, and its fixable. No need to worry about how it went wrong. Just start with the new approach.
Not all those who wander are lost.
Life is just a leap of faith.
Spread your arms and hold your breath and always trust your cape.
Two things define you. Your patience when you have nothing, and your attitude when you have everything.