Originally Posted by Jake
.... Meanwhile I did not realize but I had not turned off the switch to the water pump. So two hours later when I got home and unhooked the trailer the switch was still on of course and the pump was barely running (I suspect it wore down the battery)
Now did I shorten the life of the pump so much that I cannot trust it?
I did hook up camper to my 120 volt at home and the pump seems to operate okay and brings up pressure and stops like it should with new water in the tank. But did it run for two hours non stop during my trip (I think it did) ...and did I do damage to pump that could now break down at any time soon?
No problem at all. They are designed to run dry. I have done it at least once.
What I would be more worried about is the statement about it running slow until you plugged back into shore power. Your TV should be sending 12V to the camper, to charge the battery while driving. The emergency brakes use your battery to engage the brakes in case of a disconnect, with low voltage they would not work very well. I would investigate if your fuse in the TV for the AUX power is blown/removed, or if the relay is bad. Something is not right with the 12V power.