If you fill the housing with a lubricant that clings well, is not like concrete in the cold, it will keep the moisture from freezing the cable in the housing. I just did not think to "lube" mine before the freeze. It was fine until I took a 7 hour ride in the slop a couple of weeks ago.
I am hoping that we will see some above freezing temps here on Saturday. If not, I like the light bulb idea and thanks for the contribution on that.
Now, I have to go and find a clip on light....
RL