Thanks for responding so quickly.
I have been reading posts about this particular issue.
And I have been out to the RV checking UNDER the driver's side, left foot pedal but don't see anything resembling a traditional fuse box. And I admit I don't understand what is meant by "firewall" in these posts.
Anybody got a couple of pictures? I know where the one in the engine compartment is. I have searched for pictures. Not closeups - but ones directing me to the correct area.
Driving me crazy. Plus now it's raining here. I will explore more tomorrow when the rain lets up.