I have a 2004 rancher 2 wheel drive man shift. Seems while running the battery gets weaker until it shuts down. Charging system is bad how do i check and I need a wiring diagram.Thanks. I have taken it two two mechanics and both said they fixed it and were wrong.

 

first pull the battery and have it tested .......any auto parts store will do it for free

if that checks out ok clean all your terminals......does the starter lay click when the battery is low

 

charged battery, replaced battery, kills a new battery over time.yes the relay clicks when battery is to weak to start. thanks

 

did you add any thing that could take more power than your putting out like big lights

 

no