That's a good idea, yes I can get cables from my truck onto the trailers battery. I'm hoping if it's a low voltage situation it will just work today, maybe the RV's batteries aren't that good, temps have dropped, could need replaced I guess. There is a power jack on the tongue that works okay though, so I'm not sure that's the problem. Have read about stripped plastic or metal gears, hope that's not it, we plan on moving into this RV by December 1st.