Subaru Forester Won’t Start Clicking Noise: Causes, Diagnostics, and Fixes

What a Clicking No Start Usually Means

When a Subaru Forester won’t start and you hear clicking noise, the starter circuit is usually not getting enough electrical power to crank the engine.

The sound may be a rapid click, a single heavy click, or repeated clicks, and each pattern points to a slightly different problem.

This issue is common across many Subaru Forester model years and is often related to the battery, terminals, starter motor, alternator, or a poor ground connection.

The good news is that many causes can be confirmed quickly with a few basic checks.

Most Common Causes of a Subaru Forester Won’t Start Clicking Noise

• Weak or discharged battery: The battery may have enough power to operate lights or accessories but not enough current for the starter.
• Corroded or loose battery terminals: Poor terminal contact can limit current flow and create clicking at the starter relay.
• Bad ground connection: A damaged engine ground strap or body ground can interrupt starter current.
• Failing starter motor or starter solenoid: The solenoid may click, but the motor may not spin.
• Faulty alternator: A weak charging system can leave the battery undercharged after driving.
• Ignition switch, relay, or fuse issues: Electrical control problems can keep the starter from engaging properly.
• Engine mechanical resistance: Rarely, a seized accessory or internal engine issue can prevent cranking.

How to Read the Type of Clicking Sound

Rapid repeated clicking

A fast series of clicks usually means the battery voltage drops too low when the starter tries to draw power.

This is the most common pattern when the Subaru Forester won’t start clicking noise complaint is battery-related.

Single loud click

A single heavy click often means the starter solenoid is engaging, but the starter motor is not turning.

This can happen with a failing starter, poor battery current, or a bad cable connection.

Slow clicking with dim lights

If the dash lights and headlights dim sharply while clicking occurs, the battery may be severely weak or discharged.

A loose terminal can create the same symptom.

Battery Checks That Solve the Problem Most Often

The battery is the first place to check because it causes a large share of no-start complaints.

Subaru Forester models rely on a strong 12-volt battery and high cranking amps, especially in cold weather.

• Measure resting voltage: A healthy battery should usually read about 12.6 volts when fully charged.
• Watch voltage during cranking: If voltage falls below about 9.6 volts while starting, the battery may be weak or the starter draw may be excessive.
• Inspect battery age: Many batteries last 3 to 5 years depending on climate and driving habits.
• Look for swelling or leakage: Physical battery damage indicates replacement is needed.

If the vehicle starts with a jump but dies again later, the battery may be worn out or the alternator may not be charging it correctly.

Inspect the Battery Terminals and Cables

Corrosion and looseness at the terminals can mimic a bad battery.

Even a small amount of white or green buildup can increase resistance enough to cause clicking instead of cranking.

What to check

• The positive and negative terminals are tight and secure.
• No corrosion is hiding under the cable clamps.
• The battery cables are not frayed, cracked, or overheated.
• The ground cable from the battery to the body and engine is intact.

If cleaning the terminals restores normal starting, the problem was likely a poor connection rather than a failed electrical component.

Test the Starter Motor and Solenoid

If the battery is charged and the cables are in good condition, the starter assembly becomes a prime suspect.

In many cases, the solenoid clicks but the starter motor does not spin, especially when the starter is worn internally.

Signs of starter trouble include intermittent no-starts, a single click with a fully charged battery, or a starter that works after several attempts.

If tapping the starter briefly changes the symptom, that also suggests internal wear, though it is not a permanent fix.

Because the starter is mounted low on the engine, diagnosis may require access from below the vehicle.

A technician may perform a voltage-drop test or direct starter test to confirm failure.

Check the Alternator and Charging System

A failing alternator does not usually cause the clicking sound directly, but it can create the conditions for it by leaving the battery undercharged.

If the Forester was recently driven, then parked, and now only clicks, the charging system should be tested.

• Engine running voltage should typically be around 13.5 to 14.8 volts.
• Headlights that dim while driving may indicate charging problems.
• Battery warning lights on the dash can point to alternator issues.

Repeated jump starts without verifying charging output can lead to recurring no-starts and unnecessary battery replacements.

Look at Fuses, Relays, and the Ignition Switch

Electrical control components can also prevent the starter from engaging.

The starter relay, ignition switch, and related fuses should be checked if the battery and starter seem healthy.

In some Subaru Forester configurations, starter operation may also be affected by the brake pedal switch, range selector position, or push-button start system logic.

If the vehicle only starts in Park but not Neutral, the shift interlock or range switch may be involved.

Cold Weather, Parasitic Draw, and Short Trips

Cold temperatures reduce battery performance, which is why a Subaru Forester may click and fail to start on winter mornings even if it seemed fine the day before.

Short trips can also prevent the battery from fully recharging, especially if the vehicle sits for long periods.

A parasitic draw is another common cause.

This happens when an electrical component continues to use power after the vehicle is off, slowly draining the battery overnight or over several days.

Interior lights, aftermarket accessories, and faulty modules can create this issue.

Step-by-Step Diagnostic Sequence

1. Turn on the headlights and observe brightness.
2. Try starting the vehicle and note whether the click is rapid, single, or weak.
3. Check battery terminal tightness and corrosion.
4. Test battery voltage with a multimeter.
5. Jump-start the Forester and see if it cranks normally.
6. If the jump works, test the battery and alternator.
7. If the battery is healthy, inspect starter cables, grounds, relay, and the starter motor.

This sequence helps separate battery problems from starter or wiring problems without replacing parts unnecessarily.

When the Problem Is Probably Not the Battery

If the battery tests strong, terminals are clean, and the vehicle still only clicks, focus on the starter circuit.

A repeated click with no crank after a successful jump start can indicate a worn starter solenoid, a failing starter motor, or excessive resistance in the wiring.

If the battery goes dead repeatedly after being replaced, the real issue may be alternator output or a parasitic electrical drain.

In that case, replacing the battery alone will not solve the underlying fault.

What a Mechanic Will Usually Test

A professional diagnosis often includes battery load testing, charging system testing, voltage-drop measurements across the positive and negative cables, and starter current draw testing.

These methods pinpoint whether the circuit is losing power, losing ground, or failing at the starter itself.

For Subaru Forester models with push-button start, the technician may also scan for diagnostic trouble codes from the body control or immobilizer system if the starter does not engage consistently.

When to Stop Driving and Get Help

If the clicking noise happens repeatedly, the battery keeps dying, or the Forester starts only after multiple jump starts, the issue should be addressed soon.

Continuing to drive with a weak battery or bad charging system can leave you stranded and may strain the starter motor.

If you smell burning, notice melted cable insulation, or see severe corrosion at the battery terminals, avoid repeated starting attempts until the problem is inspected.

Electrical faults can worsen quickly when the starter is forced to draw excessive current.