I have a 2015 Hyundai Genesis 6cyl 3.8 Sedan, not Coupe. I was changing the Battery yesterday, which is located in the Trunk. I disconnected the battery terminals, took out the old battery, then put in the new battery. Since it was dark out already, and this battery has 3 additional accessory wires and the main Positive Lead, I decided to wait until the morning at daylight to finish up and connect the new battery to the wiring terminals. I made a bonehead move and closed the trunk!
Since there is no Power to the car, the trunk won't unlock so I can connect the battery back up. The key that is in the FOB will not turn the trunks keyhole lock to manually unlock it. The key did work to manually unlock the driver-side door so I can get into the car, but since there is no power, the trunk release button won't work.
I called AAA, they connected up to a positive power connection located in the engine compartment, which did illuminate and power up the car's cluster, but nothing else in the car will work. Power anything, like door locks, windows, etc will not work. The only thing that will work is listening to the radio and the center cluster illuminating. Going through the backseat trunk compartment access isn't big enough for an adult or small child to squeeze through. Both myself and AAA did not visually see an emergency trunk release that is supposed to be located in the trunks lid to release it. I'm assuming that the lack of power connection to one of the other accessory leads is the culprit for why the trunk won't release.
I called the dealership and they told me to contact a Locksmith. The locksmith said that since the physical key won't turn in the trunks key hole, it's likely that the the lock cylinder's are likely seized up from non-use. The Locksmith said the only option is to drill it out.
You need a trained chimp to climb into the trunk starting at the back seat to activate the manual trunk release that Hyundai hides for you...
Contact your local zoo to hire/lend such a helping hand.
You say you have a key that should be able to release the outside trunk lock, but does not turn??
Take a bottle of silicon oil or wd-40 or any other light oil spraycan, inject it into the keyhole a few times, smoke a cigarette and try to turn the key... When it doesn't: repeat...
Drilling out the lock will damage and cost.
BTW: I prefer the chimp, but this depends on availability
Can you get into the trunk by folding down the back seats? (I have no idea if the back seats do that in a Genesis but I've seen that done on other cars to get into a trunk that won't open from the outside.)
The Genesis Sedan's backseats don't fold down. There is only the trunk access hole in the center. The Genesis Coup style has the fold down backseats.
Is there a release handle inside the trunk? If so can you fish something through that center access hole to pull on it? (Edit: I see you mentioned looking for one but I'd look again using a nice bright light.)
There is no Manual trunk release. 🙁
Inside trunk releases have been a requirement in the U.S. for over 20 years.
Welp, you're gonna wanna take a flashlight, get your phone, fold the seats, and carefully crawl to the trunk from inside.
I do not see why you need AAA, a dealer, and a locksmith to just connect a few cables from inside the trunk... C'mon.
(I do not know if the internal truck popper is mechanical or electrical so you may need to just finish the replacement in that position)
Going through the backseat trunk compartment access isn't big enough for an adult or small child to squeeze through.
Lesson 1 out of this drama: don't work on your car in the dark (with alocoholic beverages taken?)
As TS stated, he cannot enter the trunk physically from inside the car, nor any of his offspring.
Admit, he should post pictures of proof of that fact.
I'm interested in how this will end (without using the key in his hands). 😀