Thor Forums

[javelin]

Welcome to the forum. I’ll start by saying I don’t know your coach specifics and I am not a BIRD charging system expert either, but after reading your story it seems to me that the only relay or device you did not check or replace is the use/store latching relay itself. That latching relay is the device that basically connects the coach batteries to the converter (coach battery charger). If the use/store latching relay is failed open you will not charge your batteries when connected to shore AC and you will not get DC power from the coach batteries when not connected to shore power AC. I am attaching a basic BIRD schematic for reference.....but this is a generic schematic and may not exactly match what your coach has. I suspect the latching relay shown in the diagram on the left side of the coach battery is what connects to your converter (not shown) but it would connect on the left side of the diagram.