This was partially installed with what could be a homemade kit.
Id like to have a good schematic to start with. I think the motors are possibly bad.
For starters you should figure out if it is homemade or not. The commercially made kit I installed plugged directly into my existing wiring. It also came with complete instructions for installation and adjustment. Perhaps some photos of what you have would be helpful? OEM wiring is available for download at WCCC.