Skip the auto shop - Our mechanics make house calls

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

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...


Related questions

Q: 2006 Ford Taurus doesn't start at all

On Fords, if nothing happens when you turn the key, that's generally caused by two main things. Either the ignition switch has gone bad or your anti-theft system has gone bad. The ignition switch itself is just an electronic part...

Q: Trouble starting the car.

It sounds like you may have a faulty starter solenoid. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. When this fails, it may cause a clicking sound and will...

Q: Sporadic startup issues and stalling

Hello. It sounds like there may be an intermittent problem with the fuel pump failing. This may be what is causing the problem you are having with the starting condition. The electrical system of the fuel pump could also be...