When I start our coach it is a bit slow turning the engine over. Battery voltage drops to 7-9 v while starting. I have load tested both battery's, and they are good. I keep it pluged to shore power. Inverter is set for "Float Charge". Moniter shows charge to house battery.
I pushed the Booster switch but it dosesn't help during cranking. Anyone know of the location of the solenoid that connects the two sets of batteries? Is it the ISO solenoid in the rear run box? It hum's all the time. I don't hear a noticable click when I push the boost button. Maybe get the BOH out there tomorrow to see if she can hear it.
Coach is a 2006 Exec with ISX.
Any help will be apprecated.