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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Quick question about aftermarket HU wiring



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      03-07-2012, 12:59 PM   #1
Kapnos
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Quick question about aftermarket HU wiring

Hey Guys,
My recent Z120bt install went great in my e90 but I'm having an issue with the switched power. The stock head unit will stay on for a period after the car is turned off or until the door is opened. I would like to get that same functionality from the new HU. At the moment, as soon as the car turns off, the HU turns off. I tapped the cig lighter for ignition power and ran constant from the battery.

Any clues as to what power to tap to retain the functionality of the head unit not automatically turning off when the engine does?

Thanks for all your help in advance!
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      03-07-2012, 01:48 PM   #2
taibanl
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Did you install oem hu in trunk?
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      03-07-2012, 02:04 PM   #3
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Yes. No errors, chimes work etc.
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      03-07-2012, 04:06 PM   #4
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Pin 13 from oem hu
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      03-08-2012, 07:07 PM   #5
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Thanks,
I will hopefully try within the week and post results!
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      03-09-2012, 08:23 PM   #6
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any luck?
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      03-10-2012, 06:59 PM   #7
Kapnos
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Haven't had time to pull it all back out yet unfortunately. Check back next Wednesday through Friday... I have those days off
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      03-15-2012, 01:18 PM   #8
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Pin 13 from the oem HU to the Pioneer's Ignition lead results in the Pioneer HU coming on when the car is unlocked but restarting when the car is started. It also does not turn off when the key is pulled. It instead waits until the car goes to sleep.

Last edited by Kapnos; 03-15-2012 at 01:43 PM.
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      03-15-2012, 02:05 PM   #9
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Pin 13 is the OEM remote turn on. It is not designed to be the 12V source of anything.
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      03-15-2012, 02:12 PM   #10
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So where would you suggest I grab 12v switched/acc that will turn off when the oem hu turns off instead off when the engine turns off?
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