Ignition switched 12v in trunk / battery compartment?

[veer90]

Looking for an ignition switched 12v source I can tap into around that general area.

Only other one I know of is cigarette lighter fuse in the glove box. Don't want to run wires that long all the way to the back.

 

[Torgus]

If the OEM system is the standard 10-speaker, the OEM remote turn on is pin 10 in the OEM amp connector. If the OEM system is Logic7, the OEM remote turn on is pin 13 in the rear main connector of the OEM HU/iDrive. So the internet tells me.

That being said it is pretty quick to run a line back to the trunk, yes it is a hassle but easily done.

The real question is what do you need it for

 

[veer90]

If the OEM system is the standard 10-speaker, the OEM remote turn on is pin 10 in the OEM amp connector. If the OEM system is Logic7, the OEM remote turn on is pin 13 in the rear main connector of the OEM HU/iDrive. So the internet tells me.

That being said it is pretty quick to run a line back to the trunk, yes it is a hassle but easily done.

The real question is what do you need it for

My friend wants to try controlling the 2 fuel pumps in my car with an Arduino. This would be the power supply

 

[GreyNBlueE92]

If the OEM system is the standard 10-speaker, the OEM remote turn on is pin 10 in the OEM amp connector. If the OEM system is Logic7, the OEM remote turn on is pin 13 in the rear main connector of the OEM HU/iDrive. So the internet tells me.

That being said it is pretty quick to run a line back to the trunk, yes it is a hassle but easily done.

The real question is what do you need it for

Wouldn't that just be a signal wire to tell the amp to turn on? Maybe BMWs are different, but that's how it is in the aftermarket world.

In short, I dont think that will work...

 

[colinod]

I use the exhaust valve actuator pigtail

 

[chrisdfv]

I use the exhaust valve actuator pigtail

Same. I use it as the signal wire for my sub amp. it will come on briefly when you unlock the car, but will shut off again if you don't actually turn on the ignition FYI.

 

[Milan]

What you should do almost regardless is find the switched 12v and have it turn on a relay, and then take your power from the battery.

 

[9krpmrx8]

^ This.