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Turn the key and no click just a humming noise. Replaced starter, solenoid, ignition key switch, new battery. What can be the problem.???

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Hey Herman , what make , model an year vehicle ? Where is the humming noise coming from ? Engine compartment ? near starter ? Maybe the ABS motor ? have someone try an start it an you look an listen to pinpoint where the noise is coming from ! did you check the starter relay ? is the security light lit on the dash ? You replaced a lot of parts an still not starting , need to test thing's first ! It's electrical you can test with a volt meter !

Posted on Apr 29, 2015

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Starter

Posted on Apr 29, 2015

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My Battery is Good but when i turn it on no Clicking or turn over I Have Lights tho Whats the Problem?? HELP!!


Bad ignition switch, or starter motor or solenoid.

No clicking noise points to ignition switch isn't getting the juice to the solenoid (which is the thing that makes the clicking and allows the starter motor to engage the flywheel).

Jiggle around the key in the ignition and pull on the wiring harness a little. If you get it to start then you know the problem is in the switch or the wiring to the starter solenoid

Mar 06, 2015 | Cars & Trucks

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Rapid clicking noise when trying to start the engine?


Hi There,

You turn the key to start your engine and....
a series of rapid clicks. Your car won't start. What's going on?

That clicking noise is your starter solenoid.

Your starter needs a lot of power to turn your engine. That much power would melt your ignition switch in no time if it passed directly through it. So what happens instead is your ignition switch actuates another electric switch called a solenoid. The solenoid is a really HEAVY DUTY switch.

Inside it are two copper contacts that look like the head of a bolt only rounded. The battery is attached to one, the starter to the other. Hovering above them on a spring is a copper clad disk attached to an iron core. The iron core is inside an electro-magnet.

When you turn your key (in a perfect world), an electromagnet is activated that yanks the disk towards the contacts (Making a single decisive healthy CLICK). When they connect, the circuit is closed and the starter turns over. OK.

When things go wrong:

Low Battery:
  • The solenoid requires power to actuate.
  • The starter takes a lot more power to turn the engine.
  • When the battery is low, there isn't enough power to do both.
  • You turn the key, solenoid engages (CLICK)
  • Power goes to the starter
  • The starter tries to turn the engine
  • The draw from the starter drops the available power below the minimum needed to keep the solenoid engaged.
  • The solenoid disengages
  • The starter is no longer drawing power
  • The additional power allows the solenoid to re-engage (Click)
  • Repeat the process for as long as you have the key turned. (CLICKCLICKCLICKCLICK)
That's where those clicks are coming from and why.

The remedy:
Short term - Jump start
Long term - Charge or replace battery.


I wanted to explain what was happening rather than just saying 'dead battery, replace it'. That way you can judge for yourself whats going on.

Best regards
Mike

on Apr 20, 2010 | Ford F-100 Cars & Trucks

3 Answers

Pontiac g6 won't start not the battery could it be the starter makes no noise when key is turned?


The ignition switch sends voltage to the starter solenoid, if no neutral or brake switch is involved. It is sometimes located ON the starter. It activates a high-current switch that engages the starter. If you don't hear a click, the solenoid could be bad. Since the high current can damage the contacts, you could still hear a click and not get the starter to spin. Sometimes hitting the solenoid, or starter lightly with a wrench or hammer will realign the contacts and you can get another spin from the starter. Hitting the exposed contact on the cable that goes straight from the battery to the solenoid can cause a spark, or explode the battery.

So, the ignition switch, battery, starter, starter solenoid, a fuse, a neutral switch, brake switch, or wiring can be the cause of a starter not engaging.

Jun 01, 2014 | 2000 Ford Taurus

1 Answer

Hyundai accent 2001 will not start all lights work radio works heater fan works battery in 3 months old when I turn the key all i hear is a humming sound for about 1 min. than nothing. weather has be


The humming would be the fuel pump coming on. It should only hum for a few seconds, then shut off.
Your problem is with the start circuit from the battery to the starter, or from the ignition switch to the starter solenoid. Check the connections at the starter (the big cable) for tightness.
Is the battery charged up enough to turn the engine over? Check by turning headlights on and observe while someone turns key to crank. If they dim a LOT, then either battery is too low, or the starter is bad and needs removing for testing. If brightness doesn't change, then the circuit from ignition switch to starter solenoid is likely not working. Check for 12 volts at the small wire to starter solenoid with key in cranking position. If you have power there, the solenoid may be bad. Remove starter for testing. If no power at solenoid in starting position, then either the ignition switch is bad or the neutral safety switch might be the problem, or the wiring from the switch to the starter solenoid is not passing current.
Good luck.

Jan 14, 2012 | Hyundai Accent Cars & Trucks

2 Answers

My 1996 Chevrolet Blazer won't start most of the time. Engine don't turn over, or the starter when I turn the key. All I can hear is some clicking coming from the carbarator & a humming noise under my...


The humming noise you hear is the fuel pump. It is probably your starter soleniod. If you hear an electric click under the dash near the steering column when you turn the key then the ignition switch is ok and your starter needs to be replaced. This happened to me last month.

Dec 08, 2009 | 1996 Chevrolet Blazer

2 Answers

Everything turns on when key is turned, but engine doesnt turn, starter doesnt click, nothing...just recently replaced starter and alternator and nuetral switch (its a manual)..could it be the solenoid?


If you have verified that the battery has 12volts, and there is power 12V at the trigger wire on the solenoid with the key turned to start, likely the solenoid is bad...I'd question this though because the solenoid comes with the starter and therefore should be new. (defective?) If there's no power there, re-check what you replaced and also ignition switch.

Sep 10, 2009 | 1992 Chevrolet Cavalier

1 Answer

Engaging the Starter


Check to make sure that when you turn on ignition switch the solenoid is receiving power to engage the pinion gear and feed power to the starter motor. It is new so I suspect it is not receiving juice. U may have some bad connection causing the intermittent issue. PIA.

Mar 23, 2017 | 1998 Buick Riviera

4 Answers

Car wont start, makes a clicking sound under the hood


When you turn the ignition key to the start position you apply 12 volts to the solenoid. The solenoid is a relay switch that closes when you turn the key to the start position. When it closes It applies 12 volts to the starter motor.The starter motor draws a lot of electrical current, (so much so that they could not run that current thru the ignition switch, so they use the solenoid) What you hear clicking is the solenoid closing, or trying to close.I assume that "*****clicking" as you define it is a chatter rather then one click.

Possible causes: A low battery voltage. Has the battery been replaced in the last few
years few years. Try charging over night and see what happens
Bad connections on the battery terminals. Check for any white powder on and around the battery terminal. Use baking soda and water to clean the terminals (it'll fizz) then clean theem with a terminal brush. You can get one at any auto store
Bad connection on the starter solenoid
If it a manual shift, there is usually a kill switch somewhere on the shift mechanism
that prevents the starter from working if the car is in gear and the clutch is out
In automatic shifter the kill switch is in the shift selector mechanism so you can't start the car unless you are in park.

Hope this helps Lood luck Loringh

Oct 20, 2008 | Infiniti G Cars & Trucks

2 Answers

95 F150 wont crank


the starter should be replaced. The solenoid is kikcing the pinion out but there is no contact being made to turn the starter motor. I have the exact same truck and before i changed the starter used the old starter tap trick. Tap the starter casing with a hammer and it should start turning again. hope this was helpful for you. Good luck.

Sep 16, 2008 | 1995 Ford F150 Styleside Regular Cab

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