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Can you keep the 12V outlets on when the car is off?

hill

Active Member
Apr 21, 2015
1,305
647
Lake Forest, CA
Plugged an LED light into the rear 12V and it stayed on all night.
17.24.28, Range Mode On, TeslaLog monitoring turned off.
Cabin overheat and Smart preconditioning Off.
Energy savings On but Always Connected On.
Car plugged in overnight.
gona give this a try . . . . thanks !!
.
 

ecarfan

Well-Known Member
Sep 21, 2013
19,186
13,841
San Mateo, CA
Plugged an LED light into the rear 12V and it stayed on all night.
17.24.28, Range Mode On, TeslaLog monitoring turned off.
Cabin overheat and Smart preconditioning Off.
Energy savings On but Always Connected On.
Car plugged in overnight.
Thanks for your report. It provides some clarity in this rather confusing thread. :)
 
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Reactions: Obsoletion

Freedom101

Member
Jul 8, 2017
199
179
Vancouver BC
My 12v outlets stopped working yesterday. Have an appointment with the SC next Saturday. Kind of disappointing as I was shooting a video for with the tesla tire repair kit...
 

Only Trons

Supporting Member
Jun 22, 2013
490
470
Northern Virginia
Update on the Dometic cooler I purchased (described upthread).

I've had it operating in my X for our cross country trip. Works flawlessly. Keeps items really cool/cold as selected by operator. At night when stopped at a hotel we would bring it inside and plug into into 120V outlet.

Little to no noise.
 
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Peteybabes

redneck drivin' a tesla...
Apr 8, 2016
1,235
688
'murica
my 12v outlets stay on...

i have an inverter plugged in so that i can charge my phone faster, and if i leave my phone plugged in when i go inside a friends house, i come back out to a fully charged phone or at least a phone with a much higher state of charge...
 

KevinY

Member
May 27, 2017
99
64
Hawaii
my 12v outlets stay on...

i have an inverter plugged in so that i can charge my phone faster, and if i leave my phone plugged in when i go inside a friends house, i come back out to a fully charged phone or at least a phone with a much higher state of charge...
Why don't you just use an appropriate cigarette adapter to charge your phone?
 

lymex2018

Member
Feb 4, 2018
132
145
China
I'd like to use a fridge and some astronomical devices when the car is off. Unfortunately both of my 12V outlet provide no continuous power and some tricks(current of OBD is small, find no relay to short) are not working for me. However, I find a way best suited to me.

There is a main positive input line on top of the acceleration pedal fuse box, and the fastening bolt just has enough extra length allowing me to insert a spade lug and a M6 nut. Also, I use a mini fuse holder for the positive and use 14AWG silicone wire. The negative is from nearby bolt that fix a plastic to aluminium post.
ModelX-12Va.jpg


I run the cloth-tape-wrapped wires alongside the center storage and through a hole under the bar into the under side of the center console, and install a heavy duty 12V socket onto another pre-drilled hole.
ModelX-12Vb.jpg ModelX-12Vc.jpg ModelX-12Vd.jpg ModelX-12Ve.jpg

I've tested with an 180 watts portable electronic load that it will run 13.2A continuously without any difficulty.
ModelX-12Vf.jpg


One disadvantage for this approach is that the opening is upward prone to dropping metal objects and short the circuit. I must be careful to place the build-in cover when not in use. I originally planned to install the socket alongside the existing 12V outlet but find out it take too much to remove stuffs that I'm not comfort with.
 

KevinY

Member
May 27, 2017
99
64
Hawaii
Great idea and informative. I for see a weekend project in my future. Only thing different I'll do is disconnect the existing 12v wires on the two cigarette sockets and wire them in parallel to this 12v source.
 

lymex2018

Member
Feb 4, 2018
132
145
China
Add to the above post.
I've also tested the original 12V which drop more for less current, 12.5V @10A.
ModelX-12Vg.jpg

This probably because the wire is longer/thinner or there is additional socket and relay.

By the way, the fuse for this Tesla 12V in the center console is 20A and it is F203 in the fuse box.
ModelX-12Vam.jpg
 
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Reactions: nitrox05

mattack4000

Active Member
Oct 1, 2017
2,317
897
CA
I am pretty sure the rear and front 12v turns off a few minutes after you leave the vehicle. The rear doesn't seem to stay on full time
 

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