Not sure if this is correct place for mechanical help but here goes. I have an 2008 IC BE-200, I recently replaced the rear brakes and most of all the brake lines. I have bled gallons of bubble free fluid from the bleeders (calipers and rear brake solenoid/cable system).
The pedal feels correct with out any noticeable sinking. I can't get it to disengage the parking brake and I get warning lights for brake pressure, service brake and sometimes ABS. I have tried all combinations of batteries disconnected, ignition on/off bus running etc.
I use this bus for private use and don't have access to any service resources or computer analysis.
Sorry again is this is not the place for this, I am at my wits end.
Stew in upstate NY