Car makes a clicking sound but won't start

Symptoms

• Rapid clicking from under the hood when turning the key
• Dash lights dim or flicker when trying to start
• Engine does not turn over or crank
• Sometimes starts after multiple tries

Likely causes

• CommonWeak or dead batteryNot enough power reaches the starter solenoid, causing rapid clicking.
• CommonCorroded or loose battery cable connectionsA poor connection limits current flow even if the battery itself is okay.
• PossibleFailing starter motor or solenoidA single loud click with no crank can mean the starter itself is worn out.
• PossibleBad ground strap or connectionCorroded ground connections between engine and body can cause clicking without starting.
• PossibleAlternator not recharging a weak batteryIf jumps only help temporarily, the charging system may be at fault.

What to do

1. Turn on the headlights; if they're dim or go out when you try to start, suspect the battery or connections.
2. Check battery terminals for corrosion and make sure clamps are tight with no wiggle.
3. Try a jump start following proper red/black, positive/negative order.
4. If it starts after jumping, drive to get the battery and charging system tested.
5. If jumping doesn't help and you hear one loud single click, the starter or solenoid may be the issue.
6. Try lightly tapping the starter with a tool while someone turns the key (only if easily accessible) as a temporary diagnostic, not a fix.
7. Have a shop test the battery, starter draw, and connections if the problem continues.
8. Avoid repeatedly cranking the engine, which can drain the battery further and overheat the starter.

Tools and parts

• Jumper cables or jump pack
• Wire brush for terminals
• Wrench for terminal tightening

When to call a pro

If clicking continues after confirming the battery is good and charged, have a shop test the starter and its wiring before replacing parts.

Safety