2000 F53 Fleetwood PAV Battery Isolation System?

 I have a 2000 Fleetwood Pace Arrow Vision on a F53 chassis.  The coach or house batteries are not charging from the alternator when the engine is running.  I'm trying to find out:

1. What type of Battery Isolation System I have?
2. Where the solenoids and relay are located.

Thanks in advance for any information.

Hwayfun