2000 GP760 Won't hold a charge?

I have a 2000 GP 760, I keep having to charge the battery, even after a fulls day use. Do I have a short? How can I trouble shoot it? It will drain down overnight parked on the trailer.
Pete Yoder, December 2005
if your battery was close to dead and froze during the winter,then your battery wont hold a charge anymore,id unhook your battery ,charge it and let it sit for a couple days,if you still have power after couple days,then its obviously a short in your wiring and not your battery

shane pochay, March 2008