Originally Posted by 02rockwood
Fuses are all good - I am thinking it was something the RV guy didn't do when he changed the converter - the green LP light was working with a dead battery when only connected to the battery and ever since the converter was changed it hasn't worked......is there a wire for the battery lines that connects to the converter.....I have the WFCO 8735 - PUP is 02 Rockwood 1610
In your first post, you indicated that everything works when you are on shore power. The only way that can be true is if your converter is properly connected to the "12v buss". (The lights would work if it was connected with reverse polarity, but I don't think the green led on the propane sensor would, nor the refrigerator, etc.)
You also indicated that you measured voltage between the battery wires before connecting the battery. This says there are no open fuses between the converter and the battery.
Since there is only the "12v buss", and no separate connection between the battery and the converter, the only conclusion I can come to is that the battery is bad and won't take a charge. I think you should have the battery tested (at an auto-parts store). If you have a separate charger somewhere, charge it with that.
I would also verify the proper polarity at the battery (and other places) with shore power on.