BATTERY:supplies power to start the engine & power the car's electronics. A bad battery can cause: -Headlights, dashboard lights and interior lights to go dim when starting the car -Prevent the car from starting -Lights to be dim when the engine is off
BATTERY CONNECTIONS:are cables & terminals that carry power to the starter & electronics. Faulty battery connections: -Can prevent a car from starting just like a bad battery -Are usually the result of loose or corroded battery cables and terminals
RELAY/SOLENOID: allows power to get from the battery to the starter A defective relay/solenoid can cause: -Poor starter performance while lights still work fine -Intermittent starting -Failure to start
STARTER: provides mechanical energy to start the engine. A malfunctioning starter can cause: -A clicking sound when turning the key forward -Failure to start -Starting to be slow and labored -Lights become dim when attempting to start vehicle
FAN BELT:drives the alternator & any other device with a connected pulley. A cracked of frayed fan belt can: -Cause a squealing sound -A discharged battery -Noisy alternator operation if too tight -Prevent alternator from charging battery if the belt is broken
ALTERNATOR:charges the battery & powers the electronics while the engine is running. A faulty alternator can cause: -The battery to lose its charge -Poor accessory & light operation -Erratic engine operation
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