2006 E90 12V when key in

davidcole1340 · 10-22-2018, 05:55 PM

Hi,

I'm trying to find a 12v source for my bluetooth adapter that turns on when I insert the key. The cig lighter only turns on when ignition is on, but I need it to turn on just when the stereo is on or when the key is in. I have tested most of the fuses on the fuse box but most of them are always on.

Is there any 12v source which is only on when the key is in?

Thanks

ctuna · 10-22-2018, 06:12 PM

davidcole1340 · 10-22-2018, 07:22 PM

Quote:

Originally Posted by ctuna

Thanks, I'll have a look at these. I was thinking of using the trigger wire for the amp which I also use for my amp but that has the sleep mode.

It's just a USB device so I'll just mod a cig lighter to USB adapter to work with whatever power source there is.

ctuna · 10-22-2018, 07:27 PM

Don't you want it to go to sleep and not drain your battery
when you are not using the car.
The 12 volt line to the OBD is not gated by sleep mode.
Those aftermarket head unit threads have found a constant odd
fuse somewhere for the head unit memory.

davidcole1340 · 10-22-2018, 10:28 PM

Quote:

Originally Posted by ctuna

Don't you want it to go to sleep and not drain your battery
when you are not using the car.
The 12 volt line to the OBD is not gated by sleep mode.
Those aftermarket head unit threads have found a constant odd
fuse somewhere for the head unit memory.

I do want it to turn off, but with sleep mode it stays on for a couple minutes even after taking the key out. I just want it to turn off when the iDrive is turned off.

I will look at the OBD port, sounds what I am looking for.

Ali-E90 · 10-25-2018, 06:25 AM

A few years ago a post here helped me find such a wire. It was purple and in the driver footwell area (LHD).

There's a chance I have a link in my build thread, but otherwise no link handy.

Good luck.

Fb2017 · 10-26-2018, 03:57 PM

Just my two cents... but the drain that usb device will put on the electrics while the car is running or off for 20 minutes before going to sleep isn't really anything substantial. Is it really worth butchering wires when a simple add a fuse can suffice?

Use the cig lighter fuse and call it a day?

Our cars are sensitive beasts.. unnecessarily tampering with wires is just asking for trouble

10-22-2018, 05:55 PM	#1
davidcole1340 Registered 0 Rep 3 Posts Drives: 2006 E90 330i Join Date: Oct 2018 Location: Auckland, New Zealand iTrader: (0)	2006 E90 12V when key in Hi, I'm trying to find a 12v source for my bluetooth adapter that turns on when I insert the key. The cig lighter only turns on when ignition is on, but I need it to turn on just when the stereo is on or when the key is in. I have tested most of the fuses on the fuse box but most of them are always on. Is there any 12v source which is only on when the key is in? Thanks
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10-22-2018, 06:12 PM	#2
ctuna Lieutenant General 1911 Rep 13,103 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	How about the power line to the Radio. or at the radio fuse. The sleep mode makes everything complicated. If you have comfort access being in the car is the equivalent of putting the key in the slot. electical e90 pdf http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja http://www.google.com/url?sa=t&rct=j...85464276,d.cGU http://www.google.com/url?sa=t&rct=j...85464276,d.cGU head unit http://www.e90post.com/forums/showth...ight=head+unit http://www.e90post.com/forums/showthread.php?t=1457320 http://www.e90post.com/forums/showthread.php?t=1036190 http://www.e90post.com/forums/showth...hlight=dynavin http://www.janus-design.net/english/ http://www.e90post.com/forums/showthread.php?t=355089 http://www.e90post.com/forums/showth...ight=head+unit http://www.e90post.com/forums/showth...hlight=dynavin http://www.e90post.com/forums/showth...hlight=dynavin http://www.e90post.com/forums/showth...light=retrofit http://www.e90post.com/forums/showthread.php?t=993447 http://www.e90post.com/forums/showthread.php?t=1016187 https://www.bmwgm5.com/Logic7_E90_91_92_93.htm http://www.e90post.com/forums/showth...hlight=dynavin What device are you using?
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10-22-2018, 07:27 PM	#4
ctuna Lieutenant General 1911 Rep 13,103 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Don't you want it to go to sleep and not drain your battery when you are not using the car. The 12 volt line to the OBD is not gated by sleep mode. Those aftermarket head unit threads have found a constant odd fuse somewhere for the head unit memory.
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10-25-2018, 06:25 AM	#6
Ali-E90 Colonel 379 Rep 2,365 Posts Drives: 2007 E90 323i (Cdn) Join Date: May 2013 Location: Toronto, Canada iTrader: (3) Garage List 2008 BMW M3 [8.00] 2007 BMW 323i [8.50]	A few years ago a post here helped me find such a wire. It was purple and in the driver footwell area (LHD). There's a chance I have a link in my build thread, but otherwise no link handy. Good luck. __________________ Check out my Mod Thread Here
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10-26-2018, 03:57 PM	#7
Fb2017 First Lieutenant 40 Rep 345 Posts Drives: bicycle Join Date: Nov 2014 Location: Canada iTrader: (2)	Just my two cents... but the drain that usb device will put on the electrics while the car is running or off for 20 minutes before going to sleep isn't really anything substantial. Is it really worth butchering wires when a simple add a fuse can suffice? Use the cig lighter fuse and call it a day? Our cars are sensitive beasts.. unnecessarily tampering with wires is just asking for trouble
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