Have a 96 HR Endeavor DP. Freightliner chassis, 230 Cummins w Allison 6 speed. Need to know where the fuse is for the vacuum pump that runs the a.c. dash duct work. Also the source of the 12 v power. ...
I suspect that my 2000 Holiday Rambler may be similar to yours as they did not make a lot of changes from one year to the next.
If you have a large fuse box in the storage bay below the driver's feet, I think you will find a fuse for the Dash Heat/AC system in that fuse box. On my coach, most anything added by Holiday Rambler that operates when the engine is running is fused within that large box.