To test it , start engine then turn on head lights to tractor , vary engine speed with throttle , do lights dramitiacly dim/brighten if so replace battery , your only runing off the alternator , it's also a good time to ck/replace your battery wires and connectors , if that batterys been in there for more than 5 years then yeah the connectors are gonna be hard to remove and most likey will require replacement
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To test it , start engine then turn on head lights to tractor , vary engine speed with throttle , do lights dramitiacly dim/brighten if so replace battery , your only runing off the alternator , it's also a good time to ck/replace your battery wires and connectors , if that batterys been in there for more than 5 years then yeah the connectors are gonna be hard to remove and most likey will require replacement