If you are willing to make several calls and do some investigative work, you can sometimes (not always tho) get the resistor values. So far I'm getting this kind of information 4 out of 5 times I try.
I do this by calling the company, and asking to speak to the engineering department (after all, I used to work in one ;D). Look at the board and note any string of numbers and/or dates on the board. The string of numbers will usually be a part number, board number, or some such thing that identifies the circuitboard. Also get Kwikee's part number for the entire controller.
Contact their engineering department and find out if they purchase the control box from another manufacturer and if they do so, who they purchased it from (you will need the approximate date the step was installed on the coach). If they ask why (some do, some don't), tell them the truth, that you are trying to replace some fried components. So far I haven't had anybody refuse my request. Ask them for the control box manufacturer's phone number and the Part number they used to purchase it.
Contact the control box manufacturer (the engineering dept again) and find out if they have the schematics for the board. If they do, ask them to identify the fried resistors. If they don't (unlikely, but possible), ask them who supplied the board, get the phone number and call the board manufacturer. The numbers on the board will identify the board for the board manufacturer.
If your fix doesn't work, and you need to get a new board, try the board manufacturer first, then the control box manufacturer, and then Kwikee. Chances are all you will get from Kwikee is a new complete control box.
Yep, its a lot of phone calling, but can result in significant savings.....2 resistors vs. 1 complete control box.
Good luck!
David D.