Welcome to the forum and irv2.
Here is a
Brochure and
Owners Guide for you.
Below in my signature are links to many more for your Newmar.
What is your floor plan and I assume this is your bed slide?
Information on your
slide system.
Looking at the floor plans for that year coach you have checked the walls of your closets and the wall behind the draws of your vanity and maybe in the bathroom cabinet or linen cabinet.
I just happen to have a MADP in my yard I can check if you have already looked in these area's.
There is no sense tearing things apart wiring is up over head in your radius side walls and you would not know what your tracing.
How did you prove is the slide control and maybe the switch or fuse wiring?