Last night when I went to bed, discovered I'd forgotten to extend the slide in there after testing earlier. Pushed 'Extend' and it slowly moved out. Sounded good though. Checked outside temp and it was 50F. HAH! Only 2 degrees difference and it's working. Then this morning, it was 36F outside and once again slide doesn't work.
I'm not worried though. It'll likely be warm enough by 9 am that it'll start working again. What I'm going to do is wait until I'm further south next week to work on it. Probably just needs the connectors cleaned and contacts brightened.
Thanks for everyone's input. I'll come back and post the solution if I spot something wrong down there on the assembly.
Here's what it looks like:
