problem with winch-Electrical

[MgOnZo700]

Hey, I hav a warn 2.5 on my atv, but everytime I try to use it, it kills the battery. The only way it will stay on is by revving it alot while winching. Any advice please.

[MuddFreak77]

Have the battery tested, it might be going bad.  Enought power to start the quad but not much else or you have a bad relay where all the wires hook to

[MgOnZo700]

ok, thanks how do you test the battery?