Yes it does. I like to understand how the circuits work and not just hook things up as described. It's been a long time since I have worked on AC circuits that the computer doesn't control everything by just using inputs from sensors. I am used to looking at flow chart style schematics called Valley Forge style that GM uses. Thanks for the info. The white wire that they want me to ground is still a puzzle though. It's the first picture on page 79 in the PDF A.C. instructions.