🚨 Craftsman T100 Single loud click but engine won't crank over
Top Culprit: Failed starter solenoid
Why It Happens: Burned or damaged internal solenoid contacts can click when energized but fail to pass enough current to the starter motor.
🛠️ The 60-Second Diagnostic Test
- Confirm the battery is fully charged and battery terminals and grounds are clean and tight.
- Use a multimeter to check for battery voltage entering the solenoid and voltage reaching the starter terminal when the key is turned to START.
💡 The Quick Fix Steps
- Disconnect the battery and remove the failed starter solenoid.
- Install the replacement solenoid, reconnect the wiring correctly, and retest starting operation.