OK, the problem is solved. Thanks MM.
About four days ago, I in stalled a spiffy new motion activated porch light -
http://www.pplmotorhomes.com/parts/r...rity-light.htm
Thus, I have left the porch light switch on all of the time, because the new light has a daylight shut-off sensor. However, what I did not realize is that the porch light switch also controls the outside step light. That is why it was on all the time.
If any of you get one of these, be aware that it come white and needs to be painted to match your coach. First a primer coat, then I used the matching touch up paint and then you need to give it a clear coat.
It is nice and bright and comes on when we walk up to the door at night. It also has a blinking LED that looks like the burglar alarm is on.