You might check under the dash access panel in front of the steering wheel, Paul. As I recall the little black keyless controller box is right under it, at least on our Monterey, along with the emergency flasher and a remote electronic tech port, all mounted on a plate.
Unfortunately I'm 450 miles away from the coach at the moment, and cannot access manuals, etc. But others here have had experience enough to probably assist you, can at least offer the brand and model info that escapes my memory, and it should be printed on the controller box anyway. Then you can look online for manufacturer troubleshooting help if nothing else. Exeter brand comes to mind.
Joel