EDIT - FIXED! Unlike what EVERY video on YouTube shows, the Negative cable had to be connected to the body of the car (the silver door metal hook onto which the door locks) rather than the door hinges.

Thank you all for your help.


After a month abroad, I came back with an extra pep in my step, ready to get behind the wheel of my 2021 992.1 Targa S.
But no, the battery was completely dead. i verified first that the key fob was working, and even changed the fob battery.
Figured out how to open the door, and pulled the tab in the fuse box, thinking this was going to be an easy in.
I had a 75% charged mobile battery boost plugged correctly, still nothing. Specs: 6000A 26800mAh.

Apparently this is not enough juice, even in Boost.

Anyone else has had the experience? Is my best best to go buy a brand new battery and use that to open the frunk.

 

Did you make sure that negative pole has good contact with chasis? Make sure that your aligator clip is not grabing painted metal part, should be on bare metal as much as possible.

 

Thanks for the tip. Consensus online seems to be to grab onto the contact points between the doors, which I had done.
I think the main issue is that I have no residual power and need a bigger boost.

I am surprised that the car battery (bought used 6 months ago) went completely flat with 4 weeks of absence though.

 

Not to be an *** but never buy used battery. No point.

For door joints, they are also painted. I am currently in China and dont have access to my car so cant check myself and tell you where should be good to connect 'minus'

Its a bit strange for me that you cant open frunk since it is such a small power draw for it.

Try to charge your booster to 100 percent and try again

 

Thanks - the car was used. The battery just came with it and was functioning perfectly well.
The mechanic on staff asked if I left it alone for weeks at a time and warned me against it. I just didn't realize that 4 weeks would make it completely flat.

The door hinges is what I've seen as the recommended point online. I'll try again at 100%.

 

I bought a recommended boost pack and it wasn't enough to release the frunk. Call AAA, they will have a big enough one

 

If I remember correctly, after you do exactly what you have done, you use the FOB rather than pulling on switch to pop the frunk.

 

Is this a lithium battery or AGM? There is a difference in that the lithium BMS is likely in protect mode and needs a full 12v to wake. If AGM you may need to charge the battery for a while to get enough voltage to jump start. 4 weeks is a long time with the parasitic drain on these cars. I have gone as long as 3 weeks with no issue but wouldn’t go longer without a trickle charger. As a future preventative measure you may considered a pigtail connector to the battery that can be accessed outside the hood area. Hope you get it going soon.

 

Had same experience last year with Battery Boost Pack could not pop hood on 992. Took the battery out of my lawn tractor, the hood clicked and opened first try. Thought I needed new battery, connected 992 battery to CTEK charger and battery came back to life. Dealer checked battery on subsequent service visit and they said it was fine. Lesson learned now have CTEk connected to both porches. Previously only charged older Porsche. Good Luck!

 

Booster typically do NOT have enough juice to open the front truck via the switch. You need to hook up another battery to the fuse box connector. A spare car battery, or one from a garden tractor - that sort of thing.

Use the booster (on Overdrive) to jump start the battery itself after the trunk is open.

 

This was my recollection as well. Surprised no one else has commented.

DaveGee

 

You and other Rennlisters might have this possible problem again, since it is relavant to most all 911s for over a decade.. So I will give you some slam-dunk fixes that will eliminate you being locked out of your Frunk in the event your battery goes dead. Now yes you can try to reach the cable in the Wheel well , but that can be more difficult, and dirty. So I'm just addressing products Antigravity Batteries makes which will make this simple as pie. The reason I developed them was because the first day I got my 3RS about 7 years ago and swapped our Lihtium Battery into it I was locked out and freaked out, didn' want that to happen ever again.

So here are a few options.

1- Antigravity CLAMPLESS HARNESS. For a low cost option you can get what we call our "Clampless Harness", it a wire harness that connects directly to the pinch bolts on your Battery's Terminals Clamps and then you route it to your passenger side windshield/frunk junction in a Porsche, where it will tuck away out of site when not in use. In the even you get a dead battery you simply connect our Antigravity MICRO-START mini Jump Starter to it and start your car. Meaning you just plug this harness directly into your MICRO-START and your ready to start your car. It literally takes a second to plug in this harness to your MICRo-START and jump it.... whereas if you don't have the harness you would have to normally have to go into the fuse panel and connect to the Red Buss and find ground and do that boloney, or access the Battery then connect your Jump Starter Clamps to it. So the Clampless Harnes eliminates those issues and it works every time since it a direct connection to the Battery Clamps which is powering the Cars system directly , not some round about method like the Fuse box is, which I feel does not allow the system to trigger consistently.
https://antigravitybatteries.com/pro...arness-msa10c/


2- An Antigravity Lithium Battery is always an option but expensive....Our Antigravity RE-START battery has built-in WIRELESS Jump Starting, so in fact, you will never been stranded by a dead battery nor locked out of your frunk. It has a built-in Reserve battery capacity that allows for emergency starts if you battery ever dies, you simply press the Wireless Keyfob if your battery ever dies, start the car and drive away or simply open the frunk. But when you go with a Lithium Battery you do get some other major benefit for the extra cost, 35 weight savings over lead/acid, 2-3x longer life, full protections built into the battery to prevent it from being damaged by over-discharge, over-charge, over voltage and many other things. So if those things are what you desire it can be and option.
https://antigravitybatteries.com/pro...tive/ag-h6-rs/


3- Last, I would like to suggest our Jump Starters over most any other brands, not simply because they are Antigravity but because we developed them to be what we say they are and we don't market falsehoods. I see you say that your Jump Starter has these specs.... Specs: 6000A 26800mAh...... that should have EASILY popped the frunk, or even easily jump started ANY Porsche, but admittedly putting energy to the Fuse box can be hit and miss at time.. But on AMazon and some other sites companies are fabricating actually specs greatly.
https://antigravitybatteries.com/pro...arts/xp-20-hd/
.

 

I'll ask the OP again...did you try this?

 

As a user, I can’t recommend the antigravity battery enough for a 992.1. The jump feature makes all of the porsche engineered nonsense a nonissue. Highly, highly recommended.

 

Has anyone mentioned that the jump pack has to be in "override" mode to provide power in case of a totally discharged battery? Actually, i have the antigravity jumper, does it have that button like the Noco does, or does it automatically sense and activate that function?