How to Test Your Car’s Starter and Solenoid Assembly

hey what’s up there it is so first I’m going to show you can test your stormwater and so on I will you’ll need for this this is a fully charged 12 volt battery instead of jumper cables from alligator clips but if you don’t have alligator clip screwdriver will work as well alright so here’s a closer look at our assembly this top piece is your solenoid this is your star motor and this gear here is what the cranks your engine when you get in your car and try to start your engine so the way almost all starters work is basically on the back of your solenoid you’re going to have three posts you’ll have a post like this and you’ll have usually a thick cable supplying this post with a constant supply of tow bolt battery voltage and you also have a smaller terminal like this one and this is where you get usually a single wire attaching to this and that Y also supplies 12 volts and that 12 volts comes from your ignition switch whenever you turn the key to the start position and then your third post which also sometimes looks like a post similar to this one is where you get 12 volts supplied from your solenoid to your starter motor by a wire cable you can usually see attached to it so a constant value supply regardless if their key is in the ignition or not and two bolts here only when you turn the key to the crank position or when you try to start the car and 12 volts from this post to your starter motor only when you get 12 volts applied to this signal post and since your saw motor is attached to your engine block by the way of these two bolts it gets its grounds from your engine alright so the first step is to attach our cables to our battery next we attach our power to this post where we get constant voltage and the ground side to the casing make sure you get good connections next I’m going to supply 12 volts to the signal post simulating a signal from our ignition switch and you can get this 12 volts directly from the battery or it probably easier to you guys to get it from your jumper cables and if you don’t have alligator clips you can just preach the gap with the screwdriver you put one on them two single posts and then you just touch your jumper cables if you have a good working starter motor and solenoid this gear will come out and spin alright here we go all right great so as you saw this gear not only popped out they also spun without any hiccups so we’ve got a good start here but let’s say you do this this and this ski only spins in place and it doesn’t come out if that happens which means that your starter motor it’s doing its job which is to spend this gear but your solenoid is not working properly and it’s not pushing this gear out on the other hand if this gear does not spin but only pops out it means that your sauna is working properly but your starter motor is probably shot now these is when you go to autozone and say you need the starter for your car you’d be something like this that comes with the solenoid and you can’t really buy them separately so if you do this this and one of the other is not working just by sorry I will come with a solenoid also before you throw in the towel and go buy a replacement starter motor and so on right make sure you inspect these posts very closely make sure they’re clean of any corrosion like if this saw motor had failed on it at the test before I go buy a new style motor I would probably take this nut out I clean this post clean this nut clean this cable of wire that’s going to our motor for most all night also clean this post here maybe with the 400 grit sandpaper to sand it down make sure it’s nice clean and shiny and then I will repeat the testing procedure and if it fails once more then I will replace the starter motor and solenoid assembly now if you just found out that your store motor is working properly but you’re still having problems starting your car then I would recommend you watch this video I’ll put a link to it right here on the side of screen and that video show you how you can properly test your battery which is usually the culprit when you have a hard time starting your car especially since symptoms of a bad battery could be very similar to a bad start or an alternator and I’ll put links to those videos on the screen and in the description box as well and also you may want to consider following me on Twitter I just opened my Twitter account a couple days ago and I’ll put a link to that in the description box as well so yeah on this videos about there if you liked the video please give it a thumbs up subscribe if you want to see more like it I’ll see you Sam thanks for watching

100 comments on “How to Test Your Car’s Starter and Solenoid Assembly”

  1. VSLComputers says:

    Very informative!

  2. Juan Gallardo says:

    simple fast great video

  3. Sabs761010 says:

    Hi, I have a problem with the starter of my stratus 00, the problem is that when the temperature is close to 0 degrees centigrade, the starter dont work, I turn on the key and no click is heard, the battery is complete charged I already check it , the weird is that when The temperature rises to 5 degrees I can start the car how I can to solve the issue.

    thanks and regards.

  4. urankjj says:

    Excellent, many thanks, from my starter to yours…..

  5. Tobias Duke says:

    nice video

  6. HollowTip Tanks says:

    For a first time doing this, would there be any possible danger in trying this? Is this safe to try?

  7. PROTOMAN247 says:

    Good fkn shit man subscribed.

  8. streetrage says:

    Very accurate, to the point, and informative. Great vid.

  9. Neil Williams says:

    Is the S post the same as a starter that has an electrical harness hook up that has no S post?
    Awesome video. Thanks a lot.

  10. Gabriel Lee says:

    My starter works sometimes and sometimes in doesnt. I took it out and tested it and the gear pops forward but not as strong as the one on your video. SHould i replace the solenoid?

  11. Henry DV says:

    I have no crank no start and I do this with the starter on my truck to start it with a long screwdriver that means the starter is good right? I'm assuming the contacts could be corroded or anything in the circuit from the relay and back?

  12. Memoona Bilal says:

    Excellent video . Thank you


    wow learn from ur video is better than million of books

  14. blix8787 says:

    thanks for the video. it helped me to determine if my starter was bad or not. which in this case it wasnt. save a few dollars.

  15. Neeraj Verma says:

    my car only start when pushed is battery dead or my self starter is not working i don't know plz guide

  16. Neeraj Verma says:

    my car only start when pushed is battery dead or my self starter is not working i don't know plz guide

  17. Bernard Donahue says:

    94 bronco 5.8 – three starters,new relay,it won't crank. Last starter worked twice then just clicks at the solenoid. All wires,connections and cables test good. Ring gear good. Could 3 in a row be a defective product line? Mfg. in china!

  18. morpheus232001 says:

    This help me today! Thanks R & W!

  19. Vladimir Avakimov says:

    Thank you.

  20. Chris Canty says:

    I have a 02 chevy cavalier that want turn over when I turn it to the on position the lights go out I jumped my starter with screw driver does that mean I have a bad starter?

  21. jafar rahman says:

    Best video and it really helped me thanks for the upload man ur the best๐Ÿ˜‡

  22. Deirdre TROTMAN says:


  23. Your Slowbro says:

    Very quick and professional. Thanks!

  24. Cynthia Foust says:

    Thank you! I really didn't want to take this in to the auto parts store to get tested, and I'll admit, i jumped when the solenoid sparked, but then i did a happy dance because nothing happened! And by that, i mean, my solenoid is bad, it popped and sparked, but that's it, not a thing from the starter

  25. flyingcat2054 says:

    Great info!

  26. John S says:

    What if my car is just giving me a single click …and having to turn the key multiple times to start

  27. Robert Ness says:

    Best fukin video ever made known to man.

  28. Chris Roma says:

    Dude great video saved me a trip to auto parts store and stopped my wallet from bleeding .i especial appreciate the remark to clean starter contacts if it donโ€™t work .my Silverado was come and go no start no click .chased all suggested areas in video .tested with multi meter and someone turning key all voltage was correct .removed starter and wouldnโ€™t fire with jump pack .cleaned all posts and it worked again .thanks for great video it helped me greatly .keep the great vids coming

  29. Bobby Stubblefield says:

    Just used this video today to help my friend out with his Subaru! Saved him some cash because the starter was still good! Thank You!

  30. Ruckster20 says:

    Good video man!

  31. Aamir Masood says:

    thanks for the video good effort it made my day easy and saved money aswell.
    Thanks again…

  32. igotta boner says:

    all good except your explanation of the solenoid it does not control the bendix as you described, the bendix is pushed up by the spinning motion of the starter motor the solenoid only transfers the power to the motor from the battery if the solenoid is bad it will not spin the motor which in turn will not make the bendix gear pop out.

  33. mothibi masire says:


  34. browill9 says:

    Wow! You saved my day brother. I love the way you explain things.

  35. Lex Soft says:

    I want to add several things concerning the mechanism of the starter :
    – Starter terminals are usually named B terminal that gets power from battery, S terminal which is powered from ignition switch and M terminal which goes to internal circuit of the starter motor.
    – Beside two coil windings, inside the solenoid house, there is a plunger that is attached to the drive assembly through a shift fork lever. There is a contact plate which serves to make contact between B terminal and M terminal.
    When the solenoid is energized through its S terminal, the resulting magnetic field will pull the plunger. This motion of the plunger causes two things :
    – the contact plate moves to make contact between B and M terminals, hence powering the starter motor.
    – at the same time, it causes, through the shift lever, the starter drive to move into mesh with the flywheel ring gear.

    So, if the starter drive only spins but doesn't move out, there are some possibilities :
    – solenoid windings are not good enough to move the starter drive
    – the plunger and/or shift lever don't function properly

    A cable between M terminal to internal circuit of the starter motor seems to be rather difficult to check on board, since it's short to inspect, but it's vital too. If it's bad, we will often only hear "Click" sound when trying to start our car.

  36. Matt W says:

    Best video so far on starters.

  37. dhh488 says:

    Great video, short and to the point.

  38. Caleb Hille says:

    this was such a quality video. great job. learned a lot. awesome awesome awesome awesome

  39. daryl Chetty says:

    If both dont work?

  40. norokelt says:

    good video man, thanks

  41. mak10 moroni says:

    When i connect my jumpers to test my starter it starts spinning right away when i connect the negative to ground my starter. It spins but does not come out without connecting the positive lead to the third outpost on the solenoid. Whats this mean?

  42. Lungile Mpati says:

    Superb video, nice and short

  43. nice guyed says:

    Terrific video… nice description of how to test starter and solenoid (which was bad). Thanks

  44. iman alizadeh says:

    Are u persian?

  45. Yolanda Hacker says:

    What is the average life expectancy of a car starter in years of milage?

  46. jw200 says:

    Another way before removing starter is to connect bulb to the ground and between the terminal where 12V appears when you turn the key.
    When bulb comes on when you turn the key then it means the starter is getting power. So you can take out starter.
    If bulb doesnt come on then first deal with getting back the power to the starter, before removing starter

  47. StupidTeenageVideos says:

    Can I wire a momentary switch between the ignition switch and the solenoid to act as some kind anti theft? Would that work?

  48. Tienchai Puangnak says:


  49. Fabian Grant says:

    couldn't be explained any simpler

  50. Omary mango says:

    Tanzania daima

  51. Makla says:


  52. Le Bodger says:

    Thankyou young man, just saved me buying a new starter.

  53. M Nester says:

    Super helpful. Thank you!

  54. Kevin D says:

    Great video, thank you ๐Ÿ˜‰

  55. RzVids says:

    is there a torque spec for the starter bolts?

  56. Mr mysterious says:

    Thank youuuuuuuuuuuuuu!!!!! my starter motor is shooting out the pin but won't spin. You've answered in detail, thank you.

  57. Michael Riedel says:

    Hey thanks for putting this one out there; now I understand just what I need to do.

  58. Steven Robinson says:

    thank you…very helpful

  59. Michael Philhower says:

    I pulled my starter and did this battery test with it and mine didn't spin or move forward.. I'm guessing mine is just completely shot. Awesome video though man

  60. djony10 says:

    Is there a way to bypass or short starter to have it start one more time to get to home or garage?

  61. Stanley Vo says:

    Interesting…! Thank you .

  62. Nick Fasola says:

    This guy is good; he is knowledgeable, precise and easy to follow, an excellent mechanic !!!

  63. tkjazzer says:

    What does it mean if it works after tapping on it with a hammer?

  64. el G Michoacan says:

    I guess my 16 year old Altima stater started that car for last time.

  65. Brad Ferguson says:

    Did this test and my starter worked fine, but smoke came out of the bottom. WTF?

  66. Dave Deatherage says:

    Thank you for this film. I just recently subscribed to you're channel, you've helped me this starter- solenoid problem, and I learned from you to check my relays from you're great video's. I'm just learning DIY'er. Thank you again, I've been at this learning 2&1/2 year's now, still a beginner, can't afford to pay others to do work, so learning to do work myself. ๐Ÿ˜Š๐Ÿ‘thanks again sir.

  67. Mike Lauer says:

    If the bendix pops out but doesn't spin, it means the solenoid contacts are bad (contrary to what the movie states). The starter would actually most likely be good because the pull in coil needs a ground through the armature, then the ground brushes to complete the circuit. Meaning that the armature and brushes are functional.
    If you remove the solenoid from the starter, and try to electro magnetically pull in the plunger ass'y, you have to ground the motor terminal (the one that the starter lead wire is attached to). If you try to just ground the case and apply voltage to the spade terminal the plunger won't pull in. Try it on any starter, any make.

  68. Chinh Phan says:

    Some starters have internal solenoids with the hot 12v wire post being made of cheap plastic that deteriorates and breaks when you try to remove it..enjoy.

  69. iheartmysquid says:

    thanks bud

  70. Karim Sadouni says:

    Good video

  71. G Zuk says:

    Thanks for this video. Solenoids can be purchased for anywhere from 15-30 dollars. Most starter failures can be narrowed down to a bad solenoid and crud build up on the shaft causing the pinion to stick.

  72. Dani_el says:

    I replaced the starter 96 Honda Accord, it worked for 4 days and then started acting up. So I have to Tapp it with a piece of wood and then it will start. It does that one time in the morning only, once it starts once in the morning it will start OK for the rest of the day.
    Any ideas ? Anybody? โ˜บ

  73. Ken Clements says:

    Great info video… short sweet and to the point.

  74. str8 hood says:

    I did this test on my starter and nothing happened. The gear didn't spin or engage. This actually drained my test battery down some from about 13v to 11.5v I was able to see this since my jumper cables have a digital voltage reader attached. Anyone ever heard of this? Anyway the video is great

  75. nathaniel holder says:

    How do I connect the the cable from the starter to the solenoid post?

  76. Stacy Park says:

    i just installed a new starter to my 4 runner it started one time and after that nothing just one click. also just put in ignition switch and relay . retested the starter . Ive checked every thing any ideas. HELP

  77. Ryan Atwood says:

    Huge help thank you ๐Ÿ‘

  78. Oliver Preisz says:


    I like your videos! I just took off the starter from my 2003 XC90 Diesel. The car had a hard time to start and stalled/cut out the starting. Other than that runs good. The starter motor and the solenoid worked in the test. I cleaned the conectors and put it back. I think my battery is crap. its was made 4 years ago. what else can it be?

    Happy new year!

    Best regards,

  79. Sermet Shaja says:

    Very good video.
    Easy to understand and follow.
    Thank you

  80. Nasser says:

    Good video ๐Ÿ‘

  81. John R Hancock says:

    Thank you this is very helpful

  82. Mark Evans says:

    He got lovely black hair ๐Ÿ˜œ

  83. Martin Edwards says:

    Thanks bro your video was very helpful

  84. WILSON! says:

    I tried this and got zapped. Can you please provide me with your address so that I can file appropriate suit? Thanks, man.

  85. ernesto del castillo says:

    There something else that its needed to add. In this test your battery can explode! It happened to me long time ago.

  86. Mario P says:

    OOOKaaay, thanks for doing this video. I went to the Local Auto Zone and one person said it was not working properly after testing, then went local Advance Auto parts and one said it was spinning but the plunger not engaging. Then went to another AZ and it said it was dead , now mind you this was the first place I wen to, so I went back again and they again said it's dead. So I saw your video hooked it up and it works flawlessly! The motor engages, the plunger engages perfect… I normally like the AZ and Advance places but because of your video I was able to verify the starter is working as needed and did not get poked in the eye to the tune of a $180 for a new one.. Thanks Man, just like when you did you're 1.8T timing chain Vid, you saved the day.

  87. KhaLeD us says:

    DIY | restoration and repair the car starter by 3v battery

  88. Peter Sheridan says:

    Good informative and easy to do.
    Peter Sheridan

  89. Crusaderglenn says:

    Thank you for the video.I managed to diagnose my faulty starter on my olds alero.

  90. Wiz Khnum says:

    Replaced battery had starter checked says it's good.. What could be the problem

  91. PelletFan says:

    Thank you for the help, I think solenoid is OK, but starter is gone. Tried your battery tip while on the tractor and all I got was clicking.

  92. Ray P B says:

    Great video. I took mine out and tested it like you said and it works fine but when it's in the car, nothing. My battery is fairly new so just wondering if you have anything else to try. Much appreciated.

  93. Trey Kashflow says:

    First lead bolt is getting constant 12V from battery (12.8 actually) so good checks out!

    I then have friend turn the key and the second bolt (from the ignition switch) is only reading 10.4V, is that my issue? Ignition switch/relay not full voltage?

    Third bolt that attaches directly from solenoid to starter ..picking up/sending nothing! Bad new solenoid i got from factory? Or is that simply the result of only the 10.4 being sent in voltage at 2nd bolt? HELP!!!!

  94. Steve Vandeveer says:

    question the main 12v power that comes from the power loom copper rod is broken any way to replace that part of the solenoid

  95. Antonio Randall says:

    Ok I'm having a problem with my 03 suburban. There's a screeching noise coming from the bottom of my truck and it's not the belt. I've been told that it's my starter not working properly. They say that the gear comes out to spin my flywheel but it doesn't go back all the way causing the screeching noise. Is that common? If not, I don't know what else it could be. Help me!

  96. qanat 'ahmad alearishi ู‚ู†ุงุฉ ุงุญู…ุฏ ุงู„ุนุฑูŠุดูŠ says:


  97. Rich S. says:

    Great job! Thanks!

  98. jogmas12 says:

    Let me tell you, if you have already taken the starter out of the car it would advantageous to know already that the starter is bad.

  99. Ann Alexander says:

    Great info!

  100. Adrian Zamora says:


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