Proper Battery Tender hook-up on 991.2
01-22-2019, 01:09 PM
#46
Rennlist Member
I know the thread title says for 991.2, but, I leave my '13 991.1 in Scottsdale during the winter. I was last here in early December. I plugged the Porsche branded CTEK into the socket in the console. Returned last night to a totally dead battery. Stupid me. I didn't notice that when I plugged it in, the status light on the charger did not light (power light was on). I had an alligator clip to lighter adapter and hooked it up overnight and it charged the battery.
So, I found that the two lighters in the car (console and passenger footwell) do not connect.
Comments?
So, I found that the two lighters in the car (console and passenger footwell) do not connect.
Comments?
Vehicle Specific Notes (updated):
- 981, 991, & 718 - For 2013-2018 Boxster, Cayman, & 911 Carrera models: Long term storage can put these cars in "Sleep Mode", which will disable the center console plug socket and shut off the battery maintainer. To bypass this, lock the door after setting up the battery maintainer. Or directly connect the battery maintainer to the recommended charging points using the optional alligator clips.
- Macan - "**" Macan models can't be charged at the 12 volt plugs inside the car. To bypass this, visit your local Porsche dealer and they can code your Macan to accept a battery maintainer. Or purchase the additional battery clamps and charge the battery directly.
01-22-2019, 02:31 PM
#47
Burning Brakes
I found this winter storage checklist - thought it might be useful on this thread
A few odd suggestions - baking soda on a cookie sheet and steel wool in the exhaust pipes...
https://porschecentresaskatchewan.co...ecklist/18313/
https://porschecentresaskatchewan.co...ecklist/18313/
01-22-2019, 04:45 PM
#48
Rennlist Member
Exactly and the same goes for the OBD connector. Why worry about differences between the battery and socket / OBD / chassis potentials. I would not even hook up my negative to a chassis ground point.
01-22-2019, 07:35 PM
#49
Rennlist Member
Here's a cut and paste from SunCoastParts website:
Vehicle Specific Notes (updated):
I went this route too after managing to kill my battery after an extended absence once too. With the nice socket hookup on the CTech chargers it is a nice clean way to go,
Vehicle Specific Notes (updated):
- 981, 991, & 718 - For 2013-2018 Boxster, Cayman, & 911 Carrera models: Long term storage can put these cars in "Sleep Mode", which will disable the center console plug socket and shut off the battery maintainer. To bypass this, lock the door after setting up the battery maintainer. Or directly connect the battery maintainer to the recommended charging points using the optional alligator clips.
- Macan - "**" Macan models can't be charged at the 12 volt plugs inside the car. To bypass this, visit your local Porsche dealer and they can code your Macan to accept a battery maintainer. Or purchase the additional battery clamps and charge the battery directly.
I went this route too after managing to kill my battery after an extended absence once too. With the nice socket hookup on the CTech chargers it is a nice clean way to go,
I did lock the door after the tender was hooked up. Didn't work.
Direct connect to the battery from now on.
Thanks for the responses.
01-22-2019, 10:26 PM
#50
Rennlist Member
Thread Starter
I hooked my Battery Tender direct to the Battery. Red to the positive battery terminal and black to the grounding point under the front hood access panel. After one day my tender light is green and the battery has reached maintenance mode. I am happy!
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mc3456 (09-23-2020)
01-23-2019, 12:45 PM
#51
Rennlist Member
On my 991.1 & 991.2, both with keyless entry, leaving the key fob in the house and then turning and leaving the dummy key "On", then plugging my CTEK 4.3 into the lighter socket seemed to work fine. The green light would come on in the usual 4-6 hours or so, and stay on.
01-23-2019, 03:48 PM
#52
Rennlist Member
A few odd suggestions - baking soda on a cookie sheet and steel wool in the exhaust pipes...
https://porschecentresaskatchewan.co...ecklist/18313/
https://porschecentresaskatchewan.co...ecklist/18313/
01-23-2019, 05:20 PM
#53
Mark
01-24-2019, 06:17 PM
#55
i bought this: Battery Tender® Junior 12V 750mA Battery Charger with the cigarette lighter adapter to keep my battery healthy.
Interesting timing, when the tender arrived, another car i have that i dont drive (Yukon Denali XL) wouldnt start due to low battery. I plugged in the tender and stuck the adapter into the cigarette lighter and within an hour, the car started.
so cool... just my .02.
Interesting timing, when the tender arrived, another car i have that i dont drive (Yukon Denali XL) wouldnt start due to low battery. I plugged in the tender and stuck the adapter into the cigarette lighter and within an hour, the car started.
so cool... just my .02.
01-24-2019, 11:19 PM
#56
You have an incorrect mental picture of the connector that the direct battery hookup uses., It isn't a cable "flopping around" with the possibility of causing a short. Somehow the designers of the product realized that would be a bad idea. Instead the connectors are nested inside the housing to prevent accidental contact and have a water-resistant boot that stays closed when not in use. Here's a couple of photos I've taken after pulling it up front under the edge of the hood. It's about as accessible and safe as you could get.
This is how I have it in my car too. Don't have to open any door or trunk lid, or pass through any weather stripping. This solution has worked very well for me. I don't have to open the car to connect or disconnect the setup and I just put a "remove before flight" tag on the starter dummy key to let me know the charger is connected.
Only visible when I pull it out for charging and it's an always available direct connection to the battery. You could potentially check battery voltage or charge a USB device using the accessories Deltran sells that connect directly to the pig tail I have hard wired to the battery. I have the Porsche Tequipment charger but consider it a hassle to have to have it connected to the 12v socket in the passenger footwell since I park my car very close to the right side of the garage.
Only visible when I pull it out for charging and it's an always available direct connection to the battery. You could potentially check battery voltage or charge a USB device using the accessories Deltran sells that connect directly to the pig tail I have hard wired to the battery. I have the Porsche Tequipment charger but consider it a hassle to have to have it connected to the 12v socket in the passenger footwell since I park my car very close to the right side of the garage.
I've not seen one of these.....but I'd prefer not to connect a battery charger to the car's OBD II port. As direct as possible to the battery seems better. Imagine a third party manufacturer's charger taking a crap while connected to your OBD II port! Not a warranty scenario I'd like to be engaged in.
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I realize I'm in the minority here but I have to laugh because I feel like I'm facing the classic "well we've always done it this way and you're way is different" scenario. I've tried both ways and like this one better. Connecting to a battery is going to have some kind of risk no matter how it's done.
01-25-2019, 02:20 AM
#57
Rennlist Member
The harness no matter which one you use is fused or at least should be, right at the connection point at the positive battery post.
And if you want to charge a battery, then you do it connected to the battery posts. It does not get any simpler. Its not rocket science.
01-25-2019, 06:19 PM
#58
What risk?
The harness no matter which one you use is fused or at least should be, right at the connection point at the positive battery post.
And if you want to charge a battery, then you do it connected to the battery posts. It does not get any simpler. Its not rocket science.
The harness no matter which one you use is fused or at least should be, right at the connection point at the positive battery post.
And if you want to charge a battery, then you do it connected to the battery posts. It does not get any simpler. Its not rocket science.
01-25-2019, 07:26 PM
#59
Rennlist Member
One person with the pic has it right on here.
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Goodwood (07-22-2021)