So I've noticed recently that the AC button of my 97 on the climate control module either sticks on or off. I'm gonna pull the module and clean it with DeOxit and see if that solves it. IF it doesn't, I've sourced replacements and found that there are 2 types for that year. The "manual" module in the first photo (what is acting up now) and the apparently thermostat-equipped digital module in the second. If I'm gonna have to replace the module, are there any additional harnesses that have to be installed or will it be UPnP if I choose to upgrade?