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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Technic 2/4 harness Install Guide?



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      03-16-2018, 05:14 PM   #1
ryangti
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Technic 2/4 harness Install Guide?

Hi Guys,

I'm going to attempt to upgrade my speakers over the weekend with the 2/4 PnP harness from Technic. I've had a search but has anyone already created a guide for this. Interested in knowing where the plug for the front door speakers are as it doesn't seem obvious from the threads that I've looks at

Thanks!
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      03-16-2018, 06:33 PM   #2
ctuna
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Are you putting in an Amp?
What is the build date of your car?
That's what the Technic harness is intended for.
The parallel connection between the doors and the floors
varys depending on the year of the car.

base system wiring pre/post 3/09
https://www.google.com/url?sa=t&rct=...tDpLJPcGkw_ui_

post 3/09 the connection is made at the underseat location,
http://www.e90post.com/forums/showthread.php?t=1378833
From the Technic website
Stereo 2/4 harness is for use with a 4-channel high level/signal sensing amp to power the front and underseat woofers. Rear speakers are kept powered by the OEM HU/iDrive unit. No need to remove OEM HU/iDrive unit. Not applicable to Stereo systems with 2-wires at the woofer connector (pre 0909 production).

Technic usually has his stuff well labeled.

Last edited by ctuna; 03-16-2018 at 07:33 PM.
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      03-17-2018, 09:36 AM   #3
ryangti
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Are you putting in an Amp? - Yes a 4 channel amp in the boot to power the door speakers and underseat subs (uprated). Its a 2012 E92.

Ill have a read through the links thanks! Its where I plug in the technic harness to power the door speakers I was struggling with and the remote connection to the amp if the headunit doesn't have to be removed. maybe it will be clear once I make a start!
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      03-17-2018, 01:21 PM   #4
ctuna
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He says you need a signal sensing amp as he does not provide
the turn on relay with that particular harness which he mounts
on the Radio connector that comes with the 4/6 or 6/6 Harness.
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