No power when the key is turned and clicking noises are heard from the inside of the vehicle when the key is not in the ignition.

If your 2007 Chevy Impala is making a clicking noise before the key is even inserted into the ignition, it could be caused by a few different issues. Some potential causes include:

1. Faulty starter motor: The starter motor is responsible for starting the engine when the ignition is turned on. If the starter motor is faulty or has worn out, it may make a clicking noise as it tries to engage with the flywheel.
2. Loose or damaged starter motor relay: The starter motor relay is an electrical component that sends power to the starter motor when the ignition is turned on. If the relay is loose or damaged, it may cause a clicking noise.
3. Low battery: If the battery is low on charge or has gone bad, it may not have enough power to start the engine, causing a clicking noise.
4. Other electrical issues: There may be other electrical issues, such as a loose connection or a problem with the ignition switch, that are causing the clicking noise.

To determine the cause of the clicking noise, it is recommended to bring your vehicle to a mechanic or a dealership for further diagnosis and repair. They will be able to test the starter motor, battery, and other electrical components to determine the source of the problem and recommend the appropriate repairs.

First off, you need to get a can of electrical cleaner/ lubricant. Disconnect the battery and then spray some of the electrical cleaner into ignition switch. Put a towel on carpet to catch any liquid that makes its way down the steering column. Most of the time this will be very dirty and will stain carpet. Spray some more and this time insert key and turn it to start position, let it return to run position and then off several times while spraying electrical cleaner into switch around key. Inside the ignition switch are these little floating pins that make contact to supply power to relays that open to give strong power to lights, starter, ect. After several years of use, they will build up corrosion, oil residue from grease used inside switch when it was new, and or dust build up. These all cause the pins to stick and also gum up the ignition cylinder that turns when you turn the key. When the pins stick, it continues to supply power to different components such as computer, horn, light relays, ect. Wal Mart and most auto parts stores sell this cleaner. Do not use WD-40 as it is a conductor and will attract dust and short allowing the power to still be supplied even when key is removed.You can also buy a powdered graphite that comes in a small bottle with a tip on it. You can squeeze some of this into the ignition slot to lubricate all the little contacts inside the ignition switch as well as the ignition tumbler...

If you had a short in the starter motor windings and held the key, you'd get a click and a burning smell. That would be the insulation burning off the electrical windings. There's a 40-amp max fuse in this circuit.

eather belt tenchiner is going out or get some belt dresing and spray on your belt good luck

Where was the clicking noise heard ? in the instrument panel , behind the dash ? Center ,left , right side etc.... possible dimmer module problem . Looking at wiring diagrams . Does the vehicle have auto lamps , daytime running lamps etc.... Do you know what wiring diagrams are ? Free one's here http://www.bbbind.com/free_tsb.html enter vehicle info. year , make , model , engine size . Under system click on lighting ,then under subsystem click on instrument panel lamps and or head lamps . Check the circuits , find the source of the clicking an you most likely found the problem .

The sound is a relay switching over when you insert the key and power the vehicles accesories. It is a normal sound, but whatever that relay powers may fail soon. It sounds like the small electromagnet inside won't hold the voltage, hence the clicking sound.

Alternator

Sounds like a bad ground. If the battery voltage does not drop when the starter is engaged, the starter is not getting the juice. Check the ground connection again. 90%

that is a starter solenoid problem.

starter has its own solenoid. the big round thing besides the real motor.

it has contacts inside which could be worn out .

that is why sometimes it make contact and sometimes not.



tnx 4 using fixya,

drcool