12v Switched?

[jeremymc7]

Yes, I read that too. Based on it saying that power is avail s when the screen is powered on, would imply that power isn't available when the screen is off. If this was the case, my V1 would power off when the screen goes off. That’s not happening. Any other thoughts?

Do you have Sentry on or other related setting that would turn the screen on.

 

[Ernest H]

Sorry for being a noob but I am trying to find a 12v signal to send to my amp’s remote wire. Rather than tap into the cigarette +ve wire at the harness (thick blue wire) can I not just tap the positive wire directly going into the cigarette lighter socket itself? ie. At the lighter end, rather than the harness end? Is there a difference?

i see your location is from Melb assuming your ride is from MIC M3. What exactly you want to do? just getting a switched 12V for your amp?

 

[Ernest H]

Sorry for being a noob but I am trying to find a 12v signal to send to my amp’s remote wire. Rather than tap into the cigarette +ve wire at the harness (thick blue wire) can I not just tap the positive wire directly going into the cigarette lighter socket itself? ie. At the lighter end, rather than the harness end? Is there a difference?

no difference tbh. goes back to how servicable you want your connections to be that's all. make sure you have inline fuse added as you don't want to short out anything else.

 

[Gokk]

no difference tbh. goes back to how servicable you want your connections to be that's all. make sure you have inline fuse added as you don't want to short out anything else.

Thanks, appreciate it

 

[hmerz]

That's exactly what I did. I tapped it into the aftermarket harness rather than anything factory.

Can you show your setup? I and trying to tap into a y connector for switched power. I know the brown is 12v where are you tapping into for the negative wire?

 

[WhiteM3P-]

Can you show your setup? I and trying to tap into a y connector for switched power. I know the brown is 12v where are you tapping into for the negative wire?

I have grounded a nut/bolt under the center console.

 

[hmerz]

I have grounded a nut/bolt under the center console.

Thank you! So to be clear this will only allow power when someone is in the car and will remain off even when sentry mode is on?

 

[WhiteM3P-]

Thank you! So to be clear this will only allow power when someone is in the car and will remain off even when sentry mode is on?

It's only on when any door opens and when the car is occupied.

 

[hmerz]

It's only on when any door opens and when the car is occupied.

I just tried it with some t taps but my ambient light kit I attached to it light are flickering. Do you have any idea why everything works it turns off when I close the door and on when opened but are flickering.

 

[WhiteM3P-]

I just tried it with some t taps but my ambient light kit I attached to it light are flickering. Do you have any idea why everything works it turns off when I close the door and on when opened but are flickering.

I don't recall if that 12v relay trigger wire is infact a PWM signal. If so, it could possibly make some leds flicker.

 

[hmerz]

I don't recall if that 12v relay trigger wire is infact a PWM signal. If so, it could possibly make some leds flicker.

Do you know what brand relay you are using?

 

[WhiteM3P-]

Do you know what brand relay you are using?

uxcell ASH-10DD 4-32VDC to 5-250VDC 10A Single Phase Solid State Relay DC-DC Relay https://a.co/d/53kJztX

 

[Ital]

Try to "Power Off" from the menu screen and see if it turns off. I think it's under safety.

 

[hmerz]

uxcell ASH-10DD 4-32VDC to 5-250VDC 10A Single Phase Solid State Relay DC-DC Relay https://a.co/d/53kJztX

Thank you! I was able to get it working!

 

[FitzRX7]

Thanks to the pioneers in this thread I can confirm that for '23 M3Ps there is a still a red wire in the passenger footwell that behaves like switched 12 volt! Hooked straight up to my radar detector (even inline fused) and works perfect. I got lucky and the first one I tested (of like 4 small red wires) was the right one!

Thanks again!

 

[snovvman]

Does anyone know of a wire that shows 12V when in Drive or Reverse and 0V when in Park? Thanks.

 

[Zangief1977]

What size posi-taps are you guys using from the armrest?

 

[marcao]

Ingineer said:
For those that want to tap the high-current 30A feed for the audio amp, it can be tapped in the trunk (right rear) look for the silver box, and the wire is a fat red (3mm).

Can someone confirm that a switched source for 12V can be obtained by tapping the thick red wire marked in this picture? I would like to tap it with an inline fuse to power a Stealth Hitch wiring kit. The standard instructions from Stealth Hitches route the wires to the 12V battery in the Frunk. Does not make any sense if there is this power source right next to where the passive module is to be installed. I understand that not all cars will have his amplifier installed. I have the premium sound option on my 2018 Model 3.


View attachment 827615

Installed Stealth hitch. This is an excellent source for 12V switched. Works like a charm. Thanks @Ingineer

 

[Adrien Dodinet]

I bought this on aliexpress and plugged in the back of the armrest. I tested the wires and can confirm that the red wire gives switch 12v, and the red wire gives constant 12v! So no need to tap into wires!

https://fr.aliexpress.com/item/1005005688247328.html?spm=a2g0o.order_detail.order_detail_item.2.240e7d56qUYEUs&gatewayAdapt=glo2fra

 

[Adrien Dodinet]

I meant the red gives switch, and the yellow constant. I can't edit my post sorry