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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Please Help!! Radio Wiring Diagram



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      04-09-2007, 09:51 AM   #1
nsr_sp6
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Please Help!! Radio Wiring Diagram

Guys please help me..

I am new here, I have 320i E90 with BMW professional head unit/radio, with 6 speakers (2 at front doors, 2 under seat, and 2 at rear shelf), without amplifier, no pdc, no i-drive, no bluetooth.
I’m planning to change the HU with aftermarket HU (clarion VRX766 or pioneer 7850, haven’t decide it yet), adding external amplifier (audison vrx 4.300) to drive front speakers and subwoofer, JL 10w7 sub woofer, Morel Elate 6 /9 3 way system for front speakers.

I prefer choosing the Morel Elate 9” woofer to put in the under seat if it’s fit..
Is it possible to put Elate 9” in under seat with minor modification?

I need some information about BMW professional HU wiring diagram, so I can tap for my next HU.
The information I need is what color to tap for:
1. ACC/Ignition On-Off
2. Remote signal to amplifier.
3. Stand by (always on) + for keeping memory or setting in HU
4. Ground
5. Radio antena
Or it would be best if someone have full wiring diagram for BMW professional HU or diagram that related to Head Unit for my project.

Already search the forum, and don’t have any luck to find the info I need…
I only find, that stock radio doesn't have Ignition on-off signal and stand by +, but there is no further information to where or what color cable exactly i should tap for my next HU to be working..

Also found the radio reception will be poor if I change to aftermarket HU, is it correct?
If it's true, is there any way to solve this?

Is there any problem if I tap to original radio wiring?

Thank u..

Last edited by nsr_sp6; 04-09-2007 at 12:57 PM. Reason: found out new info
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      09-10-2007, 08:50 PM   #2
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Hi nsr sp6, have you found the info yet. I´m also looking for the remotecable. Do you have any advice? I´ve searched all forums I know of but no answer..
//Marcus
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      09-11-2007, 11:46 AM   #3
installmd
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just finished 335i w/prof HU

i just finished a system in my friends 335i that had a professional HU in the car.

What i found was that the wire that seems like a constant memory wire shuts off with the car's computers after about 20 minutes of being turned off and key removed. there is no ignition wire behind radio, and the thin black wire that many people seem to be using as a remote trigger for adding amps to their stock systems (I believe) connects to other things so you will not want to use it for your application.

If you are going to have to run RCA's to your Audison LRx 4.300 (great choice for the highs by the way, but not sufficient power for the 10W7 sub) then run a constant wire (preferably something like a 14ga.) and a remote turn on wire along with the RCA's to the trunk. If you connect the constant to the amp power terminal along with the power cable from the battery, it will run constant power to the front of the car for your memory wire, and you can use the Soundgate Canpulse4 module to get a clean ignition trigger (without having to tap into a possible sensitive factory circuit), and depending on the headunit you choose, they might even have a cable to give you steering wheel control, if your car is setup for it, that simply plugs into the soundgate module and the rear of new head unit.

I didn't take a picture of the harness and can't remember what wire was the antena turn on, but it is in the harness. Reception on these cars with an aftermarket HU is never as good as stock, due mainly to the need for an antenna adapter, and the fact that most aftermarket headunit companies don't put as much effort into regualr radio reception anymore, they concentrate more on the satellite radio, HD radio, IPod connections, etc. Only thing i can tell you is to use the best adapter you can get your hands on. It does not need to be a powered adapter, as the turn on trigger is in the harness, not in the antenna cable.

As far as the speakers go, the Morel Elate 3ways sound phenominal (used them in my friends 335i), and I got an amazing amount of midbass out of the 6 using the stock underseat box with a half inch plywood adapter mount and having to trim back the little ribs in the box. The 9s do fit, but you have to build your own enclosure to get the depth. there is a thread on here that shows it, but it links you to Sound in Motions website. here is the link direct to that car. http://www.sound-in-motion.com/installs/bmw_330xi.html

The thread I posted was "another little fiberglass sub enclosure in progress" and it shows pics of most of the things you were asking about, including the mounting of the morels. I also have more pics of Morels in the doors and the adapters you will need to make to fit the CDM 54s.

Any questions, feel free to PM me.

Last edited by installmd; 09-11-2007 at 11:58 AM. Reason: clarification
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      09-12-2007, 01:46 AM   #4
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maybe this will help

This drawing from Parrot for BMW HU connector on page # 3.
Hope it will help you.
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File Type: pdf Pin out BMW2.pdf (245.1 KB, 1603 views)
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      06-01-2013, 09:20 AM   #5
ddmond
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Quote:
Originally Posted by bmviz View Post
This drawing from Parrot for BMW HU connector on page # 3.
Hope it will help you.
good post
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