John Deere CD4039DF008 - Manual (Page 75)

Troubleshooting
DPSG,CD03523,50 –19–10AUG99–1/2
ELECTRICAL TROUBLESHOOTING
Symptom Problem Solution
Undercharged system Excessive electrical load from added Remove accessories or install higher
accessories. output alternator.
Excessive engine idling. Increase engine rpm when heavy
electrical load is used.
Poor electrical connections on Inspect and clean as necessary.
battery, ground strap, starter or
alternator.
Defective battery. Test battery.
Defective alternator. Test charging system.
Battery uses too much water Cracked battery case. Check for moisture and replace as
necessary.
Defective battery. Test battery.
Battery charging rate too high. Test charging system.
Battery will not charge Loose or corroded connections. Clean and tighten connections.
Sulfated or worn-out battery. See your authorized servicing dealer
or engine distributor.
Stretched poly-vee belt or defective Adjust belt tension or replace belts.
belt tensioner.
Starter will not crank Engine under load Remove load
Loose or corroded connections. Clean and tighten loose connections.
Low battery output voltage. See your authorized servicing dealer
or engine distributor.
Faulty start circuit relay. See your authorized servicing dealer
or engine distributor.
Blown fuse. Replace fuse.
55-6
112699
PN=75
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