Interesting to hear... the deep cycle is brand new (purchased and installed yesterday, was load tested at the battery shop yesterday and passed with flying colors). I'll go plug the system into the house.
I've figured out the problem... haven't figured out why it's happening but that it is.
The 12v switched signal for the solenoid isn't reading voltage when the key is set to on... when running if I jumper the solenoid switch to 12v then I get a high 13v reading (it's cold and this motorhome isn't cold blooded.... a similar issue as I don't think the electric choke is getting a 12v switched signal either) for both batteries....
There's an obvious non original relay under the hood... 3 of the 4 connections are mediocre at best (read, ugly wiring harness & someone who knows enough to get in trouble and not much else)... There's continuity between the relay switched 12v and the solenoid switched 12v.... so will do some wire chasing tomorrow to try and find the problem.
Worst case scenario I can find a working 12V switched and run a new relay for the weekend.
I appreciate the help & responses.
