Sticky this^^^^^ All I know is, about 5 years ago someone posted a great how-to method of testing a used blend door actuator while it was out of the car using a couple of flashlight batteries. I think it even gave the pin connector information so you could do it in the car as well. I can't find that one anymore. Then there was a great write up on how to remove the dreaded purple window tint and install new tint. It had a video, and it used a Conair portable steamer that was under $50.00. I can't find that one anymore. I could go on, but you get the picture.