Hello cam, and welcome!
I would like to be the first to give you a warm welcome to Vacuumland! Sorry, I do not have a wiring diagram for your vacuum, but this forum is a happening place, and I'm sure someone will help you very soon.
I wanted to post this because I also have a C151D. It's solidly built and performs very well, and I like mine a lot. I believe you will be pleased with yours when you have it working.
As an aside, I recommend you investigate using Clean Obsessed (CO) HEPA bags. They are highly thought of in this forum, and I just took delivery of the style that will fit my Tristar canister vacuum. If I like them as much as I think I will, I will follow dysonman1's lead and use the CO bags in all of my Aerus/E'lux vacuums. Amazon and probably many other retailers sell these bags; the Amazon link is below.
Best wishes, and good luck getting your vacuum up and running.
Joel