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Headlights Flicker and Dashboard Lights Turn Off and On?

I have an 2005 Hyundai Elantra. I just put a new alternator and battery into it, but the headlights flicker and the dashboard lights turn off and on. Something is draining the battery, but I just don't know what it is. Any ideas and how to get it fixed would be appreciated.

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December 12, 20200 found this helpful

You either have a short somewhere between all of these pieces or it could even be a fuse is not connected properly - or going bad.
The very easiest way to find your problem is to take it your local auto parts store - Auto Zone and several other parts stores will run a diagnostic check and find what is causing the short.
This will only take a few minutes and it is free.
Please do not wait as you could get caught somewhere with no lights and no heat.

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December 12, 20200 found this helpful

Did you do the replacement parts yourself, or hire it done? If hired done, take the car back to them if the problem only occurred after their repairs, as they obviously caused the problem. If you did the repairs, double check any wiring you handled, to make sure all electric connections are clean and tightened, and that positives and negatives were not inadvertently switched.

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If you need help, Advantage Auto, Auto Zone, and others will do a free diagnostics on the electric system for you, and let you know what's wrong. Good luck.

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December 12, 20200 found this helpful

You have a short in the electrical system. Take it to a repair shop.

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December 12, 20200 found this helpful

We have a Hyundai also and before we got it, it had been recalled for electrical issues, which the dealer had to fix. I can't remember what years ours is, but I would call your local dealer and asked. I know the previous owner did not have to pay since it was a recall.

Best get that checked first!! Post back with an update!

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December 14, 20200 found this helpful

So if your headlights are flickering and dashboard lights turn off and on there is a fuze box located under the hood of your car. If you are not sure where to locate this you can google the make and model of your car and it will tell you where to locate it. All cars are different when it comes to the location. After locating the fuze box make sure to open it, nine times out of ten there will be a picture on the fuze box lid indicating the purpose of each fuze.

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My suggestion would be to locate the one for lights and most likely this is what is going on. Any of your local auto part stores carry fuzes or even a hardware store. If you go in and tell them which one you need they will help you. They are really easy to replace. If this does not work any auto part store has a machine they can hook up to your car that will most likely tell you what is going on. Good Luck

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December 14, 20200 found this helpful

This could be a electrical system problem, with the flickering and loosing power. This is a 15 year old car, and it could be a few things. The dealer (Hyundai) can perform there own diagnostic test for this car. Without this check, you could very well end up buying these same parts over and over.

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