Car Won't Start and It's Clicking: Battery, Starter, or Connection?

The clicking is your starter trying - and failing - to get enough power to turn the engine over. The good news: this is one of the most diagnosable no-start problems there is, and the type of click tells you most of the story before you open a toolbox.

Read the click

• Rapid clicking, like a machine gun: almost always a weak or discharged battery, or corroded terminals that cannot pass full current.
• One solid click, then nothing: a failing starter or solenoid is possible, but a weak battery or poor connection can cause this too.
• No click, no dash lights: a completely dead battery, a loose main cable, or a blown main fuse.
• Engine cranks normally but will not catch: that is not a starter problem at all - think fuel or spark instead.

What you can check first

• Look at the battery terminals. White or green crust and a wiggle-loose cable cause exactly this symptom and cost nothing to clean and tighten.
• Try a jump start only as directed in your vehicle's owner's manual. If it starts right up, a battery, connection, or charging-system problem is more likely; this alone does not rule out an intermittent starter fault.
• Turn the headlights on and try to start. Lights that die completely during cranking point at the battery or its connections.
• Remember the recent history: lights left on, several short trips, or a battery more than a few years old all load the dice toward the battery.

Jumped it and it died again at the next stop? Do not just buy a battery. A failing alternator will kill the new one the same way - see Page 6 before you spend.

What drives the cost

A terminal cleaning is free, a battery is a parts-store purchase, and a starter is the bigger job - parts plus awkward access on some engines. The click test above is how you avoid buying the wrong one.