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What model coach do you have?

Most motor homes have two 12v systems.  One runs the chassis/engine.  The other runs the house and through the inverter some of the 120v system.  

Use a volt/ohm meter and test all the batteries, both house and chassis.  

Make sure the salesman switch near the entry is on.  Make sure both battery cutoff switches are on.  

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Jump the salesman relay and check.  It was the problem when we had that problem.  A latching relay in the rear run box next to the big boy is where mine is located.  Still have it jumped since we never use the salesman switch and they mounted that relay in a really tough spot to get to.  Good luck.

Woody Miller

09 Dynasty

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