Car Wont Start Clicking
When your car won't start clicking, you're hearing the starter motor trying to engage without enough electrical power to turn the engine over. This is almost always a battery or electrical connection issue that needs immediate diagnosis.
Can I Drive?
No. Do not attempt to drive a car that won't start. Pushing, jump-starting, or towing should only be done if necessary to reach a mechanic or safe location.
Most Likely Causes
- 1
Dead or Weak Battery
A car won't start clicking when the battery voltage drops below 12 volts. Low charge prevents the starter from drawing enough current to turn the engine. This is the most common cause of clicking sounds during startup.
Older vehicles with original batteries (3+ years) are more susceptible.
- 2
Corroded Battery Terminals
White, blue, or green corrosion buildup on battery posts blocks electrical current flow. Even a fully charged battery cannot deliver power if the terminals are heavily corroded, causing the clicking symptom.
- 3
Loose Battery Cable Connection
A loose negative or positive cable prevents proper current delivery to the starter motor. The clicking noise occurs because the starter receives intermittent, insufficient power.
Check both the battery post connection and where the cable attaches to the engine block.
- 4
Faulty Starter Motor
A worn or defective starter solenoid may click repeatedly but fail to engage the flywheel. This often sounds like the car won't start clicking endlessly without the engine turning over.
High-mileage vehicles (100k+ miles) often have worn starters.
- 5
Bad Alternator (Not Charging)
If the alternator fails, the battery drains completely during normal driving. You may notice clicking the next time you try to start, even though the battery was recently used.
Check for a warning light on the dashboard shaped like a battery.
- 6
Parasitic Drain or Electrical Short
A faulty component drawing power while parked drains the battery overnight. The car won't start clicking the next morning because insufficient voltage remains.
Less common; usually requires professional electrical diagnostics.
How to Diagnose It
- 1
Visual Battery Inspection
Open the hood and look at both battery terminals. Check for corrosion (white, blue, or green crusty buildup), loose cable clamps, or damaged wires. If corrosion is present or cables are visibly loose, this is likely your issue.
- 2
Multimeter Battery Voltage Test
Set a multimeter to DC volts and touch the probes to the positive and negative battery terminals with the engine off. A healthy battery reads 12.6 volts or higher. Below 12 volts indicates a dead or severely discharged battery.
Tool: Multimeter
- 3
Starter Draw Test Under Load
Connect a multimeter in amp mode between the negative battery terminal and cable (or use an inductive clamp ammeter). Attempt to start the engine and observe the current draw. Normal starters draw 100–400 amps; less than 50 amps or no draw suggests a bad starter.
Tool: Multimeter or clamp ammeter
- 4
Alternator Output Test
Set the multimeter to DC volts. Start the engine (or jump-start if needed) and measure voltage across the battery terminals. A working alternator produces 13.5–14.5 volts. Below 13 volts means the alternator is not charging properly.
Tool: Multimeter
- 5
Jump Start Test
Connect jumper cables from a good battery in another vehicle to your car's battery. If the engine starts and runs normally, your battery was dead. If clicking persists, the problem is the starter or electrical circuit.
Tool: Jumper cables and second vehicle
How to Fix It
Clean Battery Terminals and Connections
Disconnect the negative cable, then the positive cable. Use a wire brush or battery terminal cleaner to scrub away corrosion. Reconnect positive first, then negative. Tighten all clamps firmly. This solves clicking caused by poor electrical contact.
Charge or Replace the Battery
Use a battery charger to slowly restore charge over 4–8 hours, or replace the battery if it's over 3 years old or fails a load test. A fully charged, healthy battery eliminates clicking in most cases.
Replace the Starter Motor
If testing confirms the starter draws insufficient current or makes noise without engaging, it must be replaced. This typically requires removing bolts from the engine block. Starter replacement usually takes 1–3 hours depending on vehicle access.
Test and Replace the Alternator
Shop recommendedIf the alternator output test shows the battery is not being charged while driving, the alternator is faulty and needs replacement. A professional should perform this test and installation to ensure proper wiring and function.
Other Engine Issues
Browse more diagnostic guides in this category.
Bad Ignition Coil
A weak ignition coil can cause one-cylinder misfires, rough running, flashing check engine light, hard starting, and poor acceleration. Coil failures often show up under load before they fail completely.
Bad Injector Symptoms
A bad fuel injector can stick open, leak, clog, or fail electrically. It can cause misfire, fuel smell, hard start, black smoke, poor mileage, or cylinder washdown.
Bad Injector Symptoms Diesel
Bad injector symptoms diesel engines typically show up as rough idling, excessive smoke, and reduced fuel economy. A failing fuel injector can damage your engine if left unaddressed, so diagnosis and repair should be prioritized.
Bad Injector Symptoms Diesel Smoke
Bad injector symptoms diesel smoke are a serious warning sign that your fuel injectors aren't atomizing fuel properly, causing incomplete combustion and visible exhaust. This condition reduces power, increases emissions, and damages your engine if ignored.
Bad Spark Plug Symptoms
Bad spark plug symptoms include rough idle, engine misfires, sluggish acceleration, and reduced fuel economy. Spark plugs ignite the air/fuel mixture in each cylinder on every combustion cycle — worn plugs misfire repeatedly, wasting fuel and stressing catalytic converters.
Bent Car Rim Symptoms
Bent car rim symptoms include vibration, pulling to one side, and uneven tire wear that develop after hitting a pothole or curb. A bent wheel compromises handling, accelerates tire damage, and can eventually cause a blowout if left unchecked.
Mistakes to Avoid
- Repeatedly trying to start the car can further drain the battery and damage the starter—stop after 3–4 attempts and seek help.
- Ignoring corrosion and assuming a new battery will fix clicking; clean terminals first before replacing a perfectly good battery.
- Touching both battery terminals with metal tools or your hands while working; always disconnect the negative terminal first to prevent shorts.