OMSU21580

Electrical System Troubleshooting

Symptom	Problem	Solution
Battery will not charge	Loose or corroded connections	Clean and tighten connections.
	Sulfated or worn-out battery.	Check electrolyte level and specific gravity.
	Loose or defective alternator/fan belt.	Adjust belt tension or replace belt.

Charging system indicator glows with engine running	Low engine speed.	Increase speed.
	Defective battery.	Check electrolyte level and specific gravity.
	Defective alternator.	See your John Deere dealer.
	Slipping alternator/fan belt.	Adjust belt tension.

Starter inoperative	Gear shift lever in gear.	Move lever to neutral.
	PowrReverser™ Transmission: EH directional reverser lever in forward or reverse.	Move lever to NEUTRAL.
	PTO lever in engaged position.	Move PTO lever to disengaged position.
	Low battery output.	See your John Deere dealer.
	Blown fuse.	Replace fuse.

Starter cranks slowly	Low battery output.	Check electrolyte level and specific gravity.
	Crankcase oil too heavy.	Use proper viscosity oil.
	Loose or corroded connections	Clean and tighten loose connections.

Light system does not function; rest of electrical system functions

Blown fuse

Replace fuse

Entire electrical system does not function	Faulty battery connections.	Clean and tighten connections.
	Sulfated or worn-out battery.	Check electrolyte level and specific gravity.
	Blown fuse.	Replace fuse.

Relay(s) sticking or nonfunctional; repeated failures

Diode to protect circuit from arcing has failed.

Replace diode module.

GENERIC,0000106-19-20070119