Ensure the vehicle is in park or neutral and the parking brake is set
Check the battery voltage with a multimeter
Inspect battery terminals and starter wiring for corrosion or looseness
Locate the starter solenoid
Turn the key to the start position and listen for a click
Test for battery voltage at the solenoid input terminal
Test for voltage at the solenoid output terminal while cranking
Check for voltage at the small trigger terminal when the key is turned to start
Bridge the solenoid terminals with an insulated tool to see if the starter engages
Perform a continuity test across the solenoid terminals
Perform a resistance test on the solenoid coil
Verify the starter motor operates when the solenoid is bypassed
Replace the solenoid if it fails voltage, continuity, or engagement tests