Originally Posted by jscanlon
My second foray in RVing. I picked up a 2011 Thor ACE 201 this summer.
Two weeks ago I was on shore power all weekend. No issues.
Now my relay for the coach battery won't turn on when not attached to SP.
I am referring to the salesman switch inside the door.
It clicks but the red light indicating it is "on" doesnt come on.
Both Coach batteries test at 12.8 at rest.
Fuse breaker in battery compartment is not tripped.
I am thinkin the relay is bad but can't find it.
Is this the same thing as the solenoid?
Any thoughts woul dbe helpful.
The "Salesman" switch is a momentary contact switch that controls a latching relay. The latching relay does not need power to remain in either one of its latched positions (connected/disconnected).
The fact that you hear the "clunk" when operating the "Salesman switch" indicates everything is working as designed except either the contacts in the latching relay are not making contact, or the 50 amp DC breaker in your battery compartment in not making good connection.
I would trip and reset the 50 amp DC breaker first to see if that resolves the issue (not the 100 amp one - that goes to the generator and leveling system).
If not, look behind your power distribution center for the latching relay. In my coach it is a black box that looks nothing like a relay - not sure what type your coach has. But like all large relays it will have two main posts with thick cables attached ad two control posts, one with an inline 5 amp fuse in the wire.