Electrical System Fault + 12V?

[anonymouse]

Just attach the fly lead and tuck it at the back of the bonnet.

Yes, that I certainly an option (although the cable still needs to pass through the plastic facing which keeps water out of the frunk area). I'd probably want an inline fuse too.

The Magcode is a bit neater than the head of a cable rattling around, and also it is designed to disconnect safely if I forget when driving off!

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[Botox]

I had similar issue with my 2020 TTS about 1-2 years ago, prior to all the battery recalls going on now. 12v would go low if I didn't drive vehicle for a couple of weeks. Only way to get it going was to jump it, as trickle charger didn't work. Had main battery repaired at Scottsdale dealership, they had someone fly in to repair it, fixed one of the cells, and now the car can sit for extended periods of time with no issues. There was a fault in the main battery not trickle charging the 12V. Should be able to let sit for 6 mos without any issues. Vampire drain on Taycan is minimal. Only thing that can trickle charge the 12V if you are away from vehicle for extended period of time is to wake care up and precondition, which will start the communication between the 2 batteries. Hopefully my turbo GT battery will be problem free. I do love the Taycan!

 

[anonymouse]

Should be able to let sit for 6 mos without any issues.

Apparently according to others on this forum, it is supposed to wake the car up to a maximum of eight times to recharge the 12V. After that , the 12V just runs down.

How a number of us managed to get a flat battery in just 9 days of cold weather is still a mystery. Potentially something in the software was not recharging as it should.

 

[Botox]

Apparently according to others on this forum, it is supposed to wake the car up to a maximum of eight times to recharge the 12V. After that , the 12V just runs down.

How a number of us managed to get a flat battery in just 9 days of cold weather is still a mystery. Potentially something in the software was not recharging as it should.

With proper main battery, no need to wake car, should sit very long periods without issue. That was only technique before repair to keep from going dead if I was away for a month or 2.

 

[eddieterry]

Apparently according to others on this forum, it is supposed to wake the car up to a maximum of eight times to recharge the 12V. After that , the 12V just runs down.

How a number of us managed to get a flat battery in just 9 days of cold weather is still a mystery. Potentially something in the software was not recharging as it should.

Interesting that the recent problems with 12 Volt battery seem to all have been during cold weather - not heard of same problem in warm weather. Obviously it is fairly rare but significantly heard of at least three during recent cold weather - I know this type of battery does not work well in cold weather so maybe the main battery does not charge for long enough on each of its eight charges - I notice that both Porsche and CTEC give rather vague warnings about charging below 0 degrees C (see attached) however plenty of Taycans are sold in colder countries than here !

 

[rb33gl]

I've had the 12v battery go flat on 2 occasions. The first time the AA gained access and got it running again and the second I did it myself. I then got a Ctek Lithium charger and am going to hard wire a Comfort Connect Car Battery Charger Flylead Lead Cable to the battery terminals, which will terminate to the side of the plastic cover. Should make connection quicker & simpler.

Incidentally, I believe the 12v batter is closer to £1500 if you get it from Porsche. I understand (but haven't had this confirmed) they are coded to the car, so you may not be able to fit your own.

 

[anonymouse]

going to hard wire a Comfort Connect Car Battery Charger Flylead Lead Cable to the battery terminals, which will terminate to the side of the plastic cover.

I'm trying to figure out where to put connectors at the moment. Are you just going to let it sit in the area under the wipers? Or in the frunk?
My car lives outdoors so we will need to keep the frunk shut, and it's hard to find a route that doesn't let water in or crush the cable.

 

[rb33gl]

I'm trying to figure out where to put connectors at the moment. Are you just going to let it sit in the area under the wipers? Or in the frunk?
My car lives outdoors so we will need to keep the frunk shut, and it's hard to find a route that doesn't let water in or crush the cable.

I had wondered how to route it too. I think this is the way to go for RHD cars. The terminal should exit under the plastic cover - I think there's enough room so it does not pinch it at this point. I'm going to fix it with double sided tape. It's then just a case of lifting the bonnet and plugging in the Ctek.

Says something when you feel you have to hardwire a trickle charger to a £1500 battery!

 

[anonymouse]

The terminal should exit under the plastic cover - I think there's enough room so it does not pinch it at this point.

Please let me know how you get on. I’m seeing a garage tomorrow who might fit mine. My first option is to fix a MagCode socket into the plastic further up from the terminals, below the wipers and not far horizontally from where you indicated. Then I wouldn’t need to open the bonnet (and it would pull away if I forget to disconnect). But I don’t know what is beneath the plastic.

I think your route, with a simple connector, would be my second option. Need to check whether the bit of vertical plastic will pinch the cable (or let in water) though.

For safety should we have a fuse in the lead? The MagCode comes with an in-line fuse but the Ctek doesn’t.

 

[rb33gl]

The Ctek cable I’ve got has an inline fuse, and traffic lights -

https://www.demon-tweeks.com/ctek-c...MIw8vAoKL1igMVFpJQBh3sTxDHEAQYBSABEgLWjvD_BwE

 

[anonymouse]

I had wondered how to route it too. I think this is the way to go for RHD cars.

I have an appointment on Monday at an independent Porsche specialist to fit mine.
From their first look there are two likely options:

MagCode connector under the wiper area. This is the most elegant depending on what they find underneath when they pull off the plastic. Silicon sealing just to be sure water doesn’t leak in.

second option is a loose connector here, with cable drilled through and a grommet for protection. We just need to be sure it doesn’t fly up and foul the wipers.

Any suggestions welcomed of course.

 

[rb33gl]

Looks like a reasonable location for a Magcode socket if it's waterproof. Your photo is taken at a different angle to mine (taken in the recent cold snap). I think I would rather keep it away from somewhere that could get wet and potentially interfere with the wipers. It may also be more difficult to get the wiring for the Magcode tucked away behind.

 

[anonymouse]

It may also be more difficult to get the wiring for the Magcode tucked away behind.

Yes, we will find out on Monday when they pull out the plastic piece.

My goal is to have a socket which can be accessed without opening the frunk, and without pinching wires.

They said that the optimum place would be on the back of the vehicle above the number plate, which is where some manufacturers put a factory-fit MagCode socket. But this is a lot of work. I think next time I buy a car, when I am paying for someone to run wiring through to the rear anyway for dash cam, I might get wiring chased in for this too. But for now it's too much work.

 

[Bennachie]

Any space in the charge port?

 

[anonymouse]

Any space in the charge port?

A good idea (in terms of neatness) but I doubt there is .. and I wouldn't want to send the garage people poking around close to the HV circuitry.

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