Joe,
I removed the wires from the motor only and the terminals and clips looked pretty good so I didn't clean them. Given that the motor worked fine before, something has changed that I haven't found yet. I will try the tips from Matt B., clean the terminals anyway and keep my fingers crossed. While removing the old dash and installing the replacement, a lot of wires got yanked and pulled so maybe something got disconnected elsewhere. After spending hours under the dash, I don't look forward to getting under there again. With the seats out, those seat tracks and cross member, no matter how much padding is on them tend to do a job on the back.