[hypoxia]

Jumper bingo!

Jim please educate me on the merge and when you should do this, I have never merged the batteries in our coach but never had a problem with engine or house batteries. Is it common to merge the batteries while underway?

The Merge relay joins the Chassis and House batteries together.  If one set of batteries are low you merge them to give enough power to start the engine or generator, if the chassis batteries aren't charging when on shore power you can merge them.  1482 automatically merges them after engine start to charge the house batteries while underway.