How to Determine if a Car Starter Motor is Faulty?

[McSebastian]

Determining a car starter motor fault is as follows: 1. The starter engages but does not work: worn starter brushes, armature fault, low battery voltage, or burnt contacts inside the solenoid switch. 2. The starter does not engage or work: ignition switch issue, starter fuse, starter relay, solenoid switch sticking, or open/short circuit in the solenoid coil. 3. The starter runs continuously: burnt contacts inside the solenoid switch. 4. Weak starting: low battery voltage, slightly burnt contacts inside the solenoid switch, loose or poor contact at battery terminals or motor terminal bolts. 5. Starter gear grinding: worn starter gear or flywheel teeth, starter gear sticking, incomplete engagement, or incomplete retraction.