have no power to car wat so ever

Battery is fully charged I have nothing at all even dash light won't come on when you turn key on

My vehicle is doing the same thing. I ensured correct battery replacement, swapped batteries but now the car registers no power. No lights, nothing at all happens with new battery connected. I am hoping it is something as simple as finding a blown fuse, or the fuse connected to positive battery terminal is bad.

I have a 2007 hyundai sonata, the car worked fine on day and the next day nothing, no dash lights and the dome lite doesn't even come on when i open the door, i replaced the battery and still nothing, i check the fuses and nothing is blown. What could it be, I'm all out of options.

I have a Hyundai Azera doing the same thing I have power going to the fuses and all that but nothing in the car works nothing electrical did you ever figure out what was wrong?

Can you provide more information about the mega fuse? I'm having a similar issue on a 2013 Sonata.

Just had same issue, was an answer ever figured out?

Did anyone figure this out? My 2016 is experiencing this.

I had the same issue with fully charged battery and the whole car dead and nothing working. I knew it had to be the 150amp main fuse at the battery or the connectors/ terminals. I checked the terminals with an ohmmeter 12 volts like it should be then I checked the voltage from the positive terminal to the car chassis and had no voltage. This told me it was a bad ground connection. I had to take the negative battery cable loose from the car chassis and sand until I had bare metal showing. The minute I reconnected the wire I heard the fuse box click on. Car started right up. So check the negative battery cable

Thank you, GuruMMHV5 !!! I am reposting because I had trouble finding your answer. From past experience, it's easier to locate if it's duplicated. I'm going to try the advice of GuruMMHV5. I'll let y'all if it does NOT work. If I don't post again here, then the following fix worked. I had the same issue with fully charged battery and the whole car dead and nothing working. I knew it had to be the 150amp main fuse at the battery or the connectors/ terminals. I checked the terminals with an ohmmeter 12 volts like it should be then I checked the voltage from the positive terminal to the car chassis and had no voltage. This told me it was a bad ground connection. I had to take the negative battery cable loose from the car chassis and sand until I had bare metal showing. The minute I reconnected the wire I heard the fuse box click on. Car started right up. So check the negative battery cable.

Yeah .. thx for guiding to Ground .. easy fix in middle of nowhere

2007 Hyundai elantra no power. Replacement of the MAIN fuse box under the hood due to factory recall. Worked fine before. Now won't start. No lights, dome or hazzard anything. Replacement of battery and ground wire. Still not firing. Can't see anything wrong with fuses. Any suggestions? Hp.rep.scott@gmail.com thank you.

Scott, On the negative ground wire, did you sand the chassis paint away where this Bolt to the car?

I had the same problem. As soon as i touched the ground on frame coming directly from the battery, the lights came on. Cleaned it up. Works like a charm now.

Can someone explain what a 'bad ground connection' means? J, did this work for you? I got home the other night and when i tried clicking the lock button on the keyfob, nothing. The keyfob was blinking red but no lights on the car. When I opened the door, there were no lights on and car wouldn't start. I will try this when I get home.

A bad ground connection means the 12 volt Battery circuit is open because the ground wire isn’t connected properly to the cars chassis. Most likely it’s corroded underneath the bolt/nut that fastens the negative ground wire to the vehicle. Paint can even cause a bad connection so you may need to sand the area around the bolt the wire connects to until you see bare metal. once you sand and reconnect the wire you will hear clicking noises from the car electronics and interior lights should work.

Update: My initial problem was that in the cold months, my car (2019 Hyundai Tucson) would not start. When I turned the key, it would give one click and nothing else would happen. It was not the ground connection. My dad had noticed that the last time he changed my battery the positive terminal wouldn't tighten completely. When we checked how secure it was, it came right off the terminal. (Please forgive my lack of car jargon.) What we did was put a shim on the terminal so that it could be fully tightened. The negative terminal was secure but we still put a shim on just incase. My dad said it is something with the way these terminal "covers" are manufactured now - they are too thin and don't secure themselves around the terminal. I'm hoping this was the solution and that I won't have a car that simply doesn't turn on anymore.