Warning Signs the Starter Motor is Failing
- Slow or labored engine cranking
- Clicking sound when turning the key
- Engine fails to crank at all
- Starter motor continues to run after the engine starts
- Burning smell coming from the engine compartment
How to Test if This Part is the Problem
- Check the battery voltage. It should be at least 12.6 volts.
- Inspect the battery terminals and cables for corrosion or looseness. Clean and tighten as needed.
- Have someone turn the key while you listen for a click from the starter solenoid. If you hear a click, the solenoid is likely working, but the starter motor itself may be faulty.
- If there is no click, use a multimeter to check for voltage at the starter solenoid when the key is turned. If there is voltage, the solenoid is likely faulty. If there is no voltage, the problem may be with the ignition switch, wiring, or a safety interlock.
- A mechanic can perform a voltage drop test on the starter circuit to pinpoint the source of the problem.
Common Failure Causes for This Part
- Worn brushes inside the starter motor
- Faulty solenoid
- Damaged armature
- Corrosion or contamination
- Excessive heat