I drove 2,000 miles the starting batteries were showing about 13.5 all along the route.
I parked for 7 days, this morning it showed 11.2, but started.
Do the house batteries carry the starting load if the starting batteries are low?
Well after 10 minutes the voltage increased to about 12, then driving 4 hours the battery lite on & off most of the way, the lite went out now showing 13.2.
My guess is they can't hold a charge, I was going to pull them and have them load tested if I can find a place near the N Rim of the Gran Canyon
can't see the age with cables in the way, they are Interstate 31 MHD, they look sealed so may not be able to check levels.
Do they charge off the battery charger when parked
Other question if they need replacing do I need Group 31's, will a group 27 work?
Any other input appreciated.