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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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Check electrolyte level and specific gravity.
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Loose or defective alternator/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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Check electrolyte level and specific gravity.
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Defective alternator.
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See your John Deere dealer.
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Slipping alternator/fan belt.
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Adjust belt tension.
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Starter cranks slowly
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Low battery output.
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Check electrolyte level and specific gravity.
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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 connections.
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Clean and tighten connections.
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Sulfated or worn-out battery.
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Check electrolyte level and specific gravity.
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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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See your John Deere dealer.
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