Alternator and Starters

Starter:
When you turn the ignition key, you are actually turning on the starter, which then cranks the engine.  When your starter isn’t working properly, the engine will start with great difficulty, or not at all.  Starter problems may be due to electrical/mechanical failure or outright breakage.

Alternator:
The alternator carries out two important tasks.  It recharges your battery while the vehicle is running to keep it at peak starting power.  It also works with your battery to operate electrical components, such as headlights, windshield wipers, and more.  A malfunctioning alternator can cause electrical components to work erratically or even cause your engine to suddenly stop operating.