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Dead battery Check battery cells, alternator belt tension and alternator output Loose or corroded battery connections Check all charging system connections Ignition circuit or switch malfunction Check and replace as necessary Alternator Light Stays On With Engine Running Loose or worn alternator drive belt Check alternator drive tension and condition, See Belt Adjustment in TUNE-UP article in the TUNE-UP section Loose alternator wiring connections Check all charging system connections Short in alternator light wiring See Indicator Warning Lights in STANDARD INSTRUMENTS in the ACCESSORIES & EQUIPMENT section Defective alternator stator or diodes See Bench Tests in ALTERNATOR article Defective regulator See Regulator Check in ALTERNATOR article Alternator Light Stays Off With Ignition Switch ON Blown fuse See WIRING DIAGRAMS Defective alternator See Testing in ALTERNATOR article Defective indicator light bulb or socket See Indicator Warning Lights in STANDARD INSTRUMENTS in the ACCESSORIES & EQUIPMENT section
2008 Honda Civic EX GENERAL INFORMATION Trouble Shooting - Basic Procedures
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