5 Ways To Test A Starter Motor

The starter motor is an essential component of your vehicle, responsible for cranking the engine to start. A malfunctioning starter can leave you stranded, so knowing how to test it can save you time and unnecessary expenses. Here’s how you can perform these tests with some basic tools.

Listen for the click sound

When you turn the ignition key, the first sign of a working starter motor is the familiar click sound. This sound indicates that the starter solenoid is receiving power from the battery but does not confirm if the starter motor is engaging properly. No sound might suggest a dead battery, faulty solenoid, or a bad connection.

Perform a visual inspection

Before diving into more technical tests, perform a visual inspection of the starter motor and its connections. Look for any obvious signs of wear, damage, or loose connections. Corrosion at the terminals can also prevent electrical current from reaching the starter motor.

Use a multimeter to test the battery

A weak or dead battery is often mistaken for a faulty starter motor. To rule this out, use a multimeter to check the battery’s voltage. A fully charged battery should read around 12.6 volts. If the voltage is significantly lower, the battery may need to be charged or replaced.

Test the starter solenoid

The starter solenoid acts as a bridge between the battery and the starter motor. To test the solenoid, you can bypass it using a screwdriver or jumper cables. However, this method should be performed with caution and only if you’re comfortable with the process. Place the screwdriver across the solenoid’s positive post and the starter motor’s body. If the starter engages, the solenoid might be the issue.

Bench test the starter motor

A definitive way to test the starter motor is by performing a bench test. This requires removing the starter from the vehicle and using jumper cables to connect it directly to a battery. This test can confirm whether the starter motor itself is functional or needs replacing. It’s advisable to consult with a professional if you’re not experienced with handling electrical components.

Testing your vehicle’s starter motor is a crucial skill that can help diagnose starting issues and prevent unnecessary replacements. The methods listed above range from simple observations to more involved testing procedures. If you’re unsure about any of these processes or prefer professional assistance, we’re here to help. 

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