Re: Chassis batteries dead
Reply #2 –
If you can get hold of a good quality high-amp portable battery charger, you could try charging the start batteries by connecting the charger to the start battery post on the isolator. That is, if the the battery isolator is easily accessible.
A "smart" portable battery charger might not want to charge the batteries if they are totally discharged. For completely dead batteries, a "dumb" old school battery charger often works better.
Of course, if the start batteries are completely dead and have been sitting in below freezing temps, then they are now most likely junk.