My first thought would be to congratulate you on taking on the job.
Times have changed a great deal since I was a position to take on rebuilding RV and some things are much better, while other parts of the job can be worse!
Way back, it was a super struggle to get even the most basic information on how RV systems worked as there was no internet!
Getting the info is much less difficult in that area and Winnebago is one of the places where you will get the best shot at getting that info! Both online and in company contacts, things are much better!
But the other side of that is the amount of really complex systems and equipment involved. As time has gone on, we have come to expect a great deal more than just simple comforts like being inside and dry!
That means all kinds of added features which obviously makes repair needed much more often and it can also be much more complex to sort out.
A simple radio is not longer simple if we want surround sound with all the bells and whistles. Automatic levelers and slides are great features but also can be a PITA to repair!
The automotive parts are where things have really changed a lot. Both good and bad!
Electronic ignitions and fuel injection are great and give far less trouble but they are a deal harder to DIY than points, plugs and carbs!
But enough with the comparing with what's gone! You have today, so maybe some help on finding tons of that info you may need to look up?
If you've not found it yet, let me point to some of the great info Winnebago gives us!
Home page:
https://www.winnebago.com/
Looking under the owners tab will lead to a vast array of info. Tons of info like basic model info, down to indepth drawings for many of the systems like electrical and plumbing!
One biggie that is far better is that you can use a slow rainy day to look over what you have setting outside ---and do it without having to crawl under the rig!
But I will warn that it takes lots of looking to find the one little hint you may need.
But that is where a forum like this can help a lot! Instead of beating your head on the wall and still not finding things, you can take a look at online info and maybe find it or come back around and there are a good number of folks here who have been sorting Winnebago problems for a long time. That experience, doesn't mean we can answer all the questions, but it does speed the process of finding those correct answers.
Half the fight of DIY is learning where to get the right info or the right parts!
Got any specific repairs that you want to do first? One of the big first points may be to add the year, make and model of Suncruiser you are dealing with. It's handy to add that to your signature block so that it appears by magic every time you post.
See what I mean?
Nothing slows progress more than having to explain every time why we need to know! Rv are not all the same!
Enjoy the trek as it can pay big time if you can get a handle on how things work BEFORE they stop!