Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Test a Starter Solenoid

How to Test a Starter Solenoid

starter solenoid

The starter solenoid is an electromechanical device used to shift the starter motor pinion gear to mesh with the engine flexplate or flywheel. When current is supplied to the solenoid ignition terminal, the magnetic windings inside are energized. This creates a magnetic field that pulls the internal plunger, which in turn moves the linkage to engage the starter. The solenoid plunger contact disc also closes the circuit between the battery and starter motor.

Modern starter solenoids are attached directly to the starter motor. In most cases, when the solenoid fails, the entire starter is replaced.

Part 1 of 2: Locate the starter solenoid

In order to safely and efficiently replace your starter solenoid you need a couple of basic tools:

Step 1: Jack up the vehicle. Jack up the vehicle and support it with jack stands.

Step 2: Locate the starter solenoid. The starter is typically mounted to the bellhousing on the underside of the engine. The starter solenoid is mounted on top of the starter.

Part 2 of 2: Test the starter

Step 1: Locate the starter ignition terminal. Locate the starter ignition terminal. It will often have an electrical connector attached to it and will be the smallest of the starter terminals. It is often referred to as the starter “S” terminal.

Step 2: Attach the jumper wires. First, attach the jumper wire to the starter ignition terminal. Then, momentarily touch the other end of the jumper cable to the battery positive terminal of the starter battery (“B”) terminal.

If the solenoid and starter are working, the starter will engage and crank the engine over. A safer way to perform this test is by using a dedicated remote engine starter. This tool is hooked up the same way but provides a button to push for starter engagement.

  • Note: The starter battery terminal has power going to it at all times. Be sure not accidentally ground it while performing the test or injury could result.

Step 3: Lower the vehicle. Once testing is complete and you’ve performed any necessary repairs, remove the vehicle from the jack stands and lower it.

If this sounds like something you’d prefer to leave to a professional, contact a professional technician, such as one from YourMechanic, to replace your starter for you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...
P0608 OBD-II Trouble Code: Control Module VSS Output "A" Malfunction
P0608 means there is an malfunction in the vehicle speed sensor A control module often due too faulty speed sensor or shorted electrical wiring.

Related questions

Q: Q: Car will not start. Just clicks

Hey there. This may be related to the starter solenoid. This is a unit on the starter that directs power to the starter allowing it to engage the flywheel when you turn the key. When this is not working properly,...

Q: can a bad evr/egr solenoid prevent this vehicle from starting ?

If the issue began after you replaced the wiring I would double check the wiring for any faults. A continuity test would be the best way to make sure that the connections are secure and making proper contact. If the...

Q: Sound when starting - 2004 Dodge Durango

Hello there. You are off to a good start in fixing your 2004 Dodge Durango. If there is a knocking sound and replacing the starter did not fix the issue, and you have a knocking noise when cranking, then it...