I think, if your chassis relay is bad (open), and you do the recall, it will not charge your coach batteries. You need to install a jumper across the 2 chassis terminals on the top left side of the BCC (4 AWG or larger). This will completely disable the chassis disconnect switch, but your coach batteries will charge. To disconnect your chassis battery you will have to disconnect the negative cable at the battery.
06 Hurricane 34FT WH W20 Chassis 8.1L 132K, Steersafe, Koni Shocks, DIY Trac Bar, Tri-Metric 2025RV Battery Monitor, 4-6V Batteries, Scan Gauge 2, Crossfires, 735W Solar Morningstar MPPT-60, WG T4 In-Motion Sat, XM Radio, 07 Chevy Malibu Maxx Toad, Falcon 2, Brake Buddy, Escapee