I found this YouTube video on exactly how to remove the trim, and what is involved in adjusting, the cables and such. They do a good job showing what needs to be done, and some advice on how to do it.
As far as access to the motor and maually opening the slide to access the motor:
In my case the slide is quite deep, so I could not access the motor with the slide closed, so I had to open the slide first.
On my Tracer the access is at the end of the motor which can be seen by going into the bedroom area (front) of the trailer, using a step-stool and looking toward the end of the trailer along the wall. I took the flexible shaft that was supplied with the trailer, and inserted it over the hex fitting and then used a drill to open the slide. My slide is not only deep, it is wide as well, so my arms and shaft were not long enough to reach, so I used a socket extension as well to reach.
I also found the manual on line:
Turns out, that my motor was the issue. . . so remove and replace.