Isolator Not Energizing

I have a 1993 Pace Arrow motorhome on a Chevy P 30 chassis. The isolator hot terminal is not energized with the ignition switch on. Therefore, the alternator is not charging the house batteries. The pin on the board is number 5 "Isolator Relay Hot Terminal." Also, the moment switch which jumps the chassis battery with the house batteries is not working because it uses the same relay. The relay is: "The Automatic Charging & AUX Start Relay.

1. Is there a fuse for this pin?
2. Can I bypass the hot wire with another hot ignition switched wire?
3. Do I have to purchase a new board?




Thanks;