🔋 Electrical — Battery, Alternator, Starter

Battery starts, alternator powers while driving, starter cranks engine. One weak link = no-start.

⏳ Battery3–5 years
💰 Battery$120–$250 / Alternator $400–$800
🛠️ DIYBattery: Beginner
⚠️ Fails likeClick, slow crank, dim lights
Electrical diagram

Quick diagnosis

  • Rapid clicks = dead battery
  • One loud click = starter
  • Battery light while driving = alternator
  • Parasitic drain? Trunk light, dashcam

Make it last

  • Clean corrosion with baking soda
  • Short trips kill batteries — drive 20min+
  • Test free at auto stores each fall
  • Keep terminals tight