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Battery will not charge
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Loose or corroded connections.
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Clean and tighten connections.
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Sulfated or worn-out battery.
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Replace battery.
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Loose or defective fan belt.
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Adjust belt tension or replace belt.
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Charging system indicator glows with engine running
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Low engine speed.
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Increase speed.
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Defective battery.
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Replace battery.
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Defective alternator.
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See your John Deere dealer.
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Slipping fan belt.
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Tighten belt.
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Starter inoperative
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Gear shift lever or Forward/Neutral/Reverse lever (reverser transmission) in gear.
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Move lever to neutral.
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PTO lever in engaged position.
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Move PTO lever to disengaged position.
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Low battery output.
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Charge or replace battery.
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Blown fuse.
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Replace fuse.
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Starter cranks slowly
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Low battery output.
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Charge or replace battery.
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Crankcase oil too heavy.
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Use proper viscosity oil.
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Loose or corroded connections.
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Clean and tighten loose connections.
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Light system does not function; rest of electrical system functions
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Blown fuse.
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Replace fuse.
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Entire electrical system does not function
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Faulty battery connection.
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Clean and tighten connections.
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Sulfated or worn-out batteries.
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Replace battery.
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Blown fuse.
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Replace fuse.
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Relay(s) sticking or nonfunctional; repeated failures
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Diode to protect circuit from arcing has failed.
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Replace diode module.
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