How the Starter Works in Your Car

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A car starter is a powerful electric motor that cranks your engine in order to start your car. The starting system consists of the motor itself, and the attached solenoid. The solenoid is what takes battery power and delivers it to the starter motor. It also pushes the starter gear forward, allowing it to mesh with the gear teeth of the engine’s flywheel.

A high current is needed to start your car, so your battery has to have enough “juice” to enable the car starting system to work properly. Most of the time, when a car won’t start and the battery is fully charged, the starter motor is to blame. Starters do wear out. Let’s talk about some common car starting problems, some of which are related to the starter.

The starter cranks but the car won’t start

This might not be a starter problem. Most of the time, this is due to battery failure. Perhaps you left a light turned on, which caused the battery to drain. If the battery doesn’t have enough charge, you might hear clicking, or the starter might turn over slowly and then finally stop. You could have poor connections, corroded battery terminals, or simply a bad battery. Before you inspect the car starter, check your battery.

However, it could still be the starter. Sometimes, the control terminal becomes corroded or a wire comes loose. If this happens, you can disconnect the control wire (if it hasn’t already become disconnected and is the source of the problem), clean the terminal, and replace the wire.

You have to jiggle the key to start the car

Chances are you have a bad ignition switch. You turn the key to the “start” position, but you’re not consistently getting current to activate the solenoid. This is a common problem, caused by the contact points in the ignition switch wearing out. The ignition switch will need to be replaced.

Car starts in neutral, but not in park

The neutral safety switch in your vehicle prevents the car from operating unless the vehicle is in neutral or park, or in the case of a manual transmission, when the clutch is depressed. If the car starts in neutral but not park, the problem isn’t in the car starter system – you have a faulty neutral safety switch.

Lights go dim when the car is started

First check your battery. Dim lights when the key is turned to “start” often indicate that there’s a problem with the battery. If you test your battery and find that it’s fully charged, the problem could be with the car starter control circuit. It could be in the control wire, the starter relay, ignition switch or neutral safety switch.

Finally, as we’ve said, sometimes starters simply go bad. This can be due to worn brushes, bad bearings, and various other problems, many of which will require the services of a mechanic to properly diagnose. A certified mobile mechanic from YourMechanic can diagnose and repair your starter at your home or office.


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Nazareth

26 years of experience
110 reviews
Nazareth
26 years of experience
Mazda 3 - Brake Pads Replacement (Rear) - Los Angeles, California
Nazareth provides excellent service. He is very friendly, flexible and proactive, I can only recommend booking him.
Mazda 3 - Brake Pads Replacement (Front, Rear) - Glendale, California
Nazareth was great to work with. I would highly recommend him for future vehicle work. He was able to get the job done quickly and in a professional manner.

Michael

7 years of experience
16 reviews
Michael
7 years of experience
Honda Accord - Brake Pads Replacement (Rear) - Scottsdale, Arizona
Michael is awesome! Extremely knowledgeable, competent, and has strong integrity. He was able to help me understand why I didn’t need certain fixes that the dealership recommended (which ended up saving me almost a thousand dollars). He’s very personable, charismatic, and skilled at what he does. I can confidently say that the “YourMechanic” website is beyond blessed to have this man working with them.
Jeep Wrangler - Brake Pads Replacement (Front, Rear) - Chandler, Arizona
Very professional and knowledgeable. I would highly recommend Michael to anyone looking for car maintenance. Great service! Thank you.

Jason

31 years of experience
167 reviews
Jason
31 years of experience
Fiat 500L - Brake Pads Replacement (Rear) - San Jose, California
Unbelievably efficient and knowledgeable. Jason just comes and gets it done. I so appreciate his commitment to Excellence as evidenced by his refusal to use the wrong oil for my oil change, even though it meant him coming out another day. Just had my brakes done in less than an hour. So happy I found this and so happy that Jason's my mechanic. I highly recommend him. Meghan in San Jose
Nissan Altima - Brake Pads Replacement (Front) - San Mateo, California
Jason was very professional and friendly. He provided extremely honest and helpful advice on issues with my Altima that would require proactive future maintenance.

Pardeep

20 years of experience
655 reviews
Pardeep
20 years of experience
Honda Civic - Brake Pads Replacement (Front) - San Jose, California
Thank you for helping to problem solve and being professional. I will likely be seeing you again soon.
Ford Fusion - Brake Pads Replacement (Rear) - Fremont, California
Again 5 star service. And already scheduling him for my next appointment. Highly recommend Pardeep for your car needs.

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