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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > 2010 e90 aftermarket sound, no amp power, half sound, at a loss for options



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      05-17-2019, 07:17 PM   #1
dgvithoulkas
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2010 e90 aftermarket sound, no amp power, half sound, at a loss for options

How you doing guys, been in the scene for years now with a fully built 335, all go some show if you will.

Audio I never touched in this car always had stuff done, so as far as whatís actually in here Iíll provide pictures.

2 JL 400 amps
1 12 in JL sub custom enclosure in left side of trunk
1 AudioControl LC6i
1 stinger in-line fuse
Upgraded speakers all around

As far as audio and electrical goes, Iím very novice. Basic connecting, disconnecting, patching up wires or connecting and taping, you get the idea.

Now, all started randomly while pulling into my restaurantóI have a twin disk clutch so starting off in 1st is like riding a young buck horse, kinda jerks you around everywhere. As that jerking happened half sound occurred (loss of power to the amps) usually occurs when my ground comes loose. But after checking all wiring, cleaning up some and reseating, still nothing.

Iíve currently been without sound for more than a month now and Iím fed up and annoyed and would like to fix it without leaving it at a shop to fiddle with all my other electrics for fuel pumps and what not.

Any info or recommendations where to start would be great. Still running OEM unit with iDrive.

Pics attached for reference of installed hardware.
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      05-17-2019, 09:50 PM   #2
ctuna
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Do you know which sound system you started with.
Since it's a 2010 it might be the stereo system.
My guess s whoever did this used the speakers outs
to drive the LCI then amps to speakers .
Looks like a mess.
If you don't know how to work on it you should take it
some place.
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      05-17-2019, 11:58 PM   #3
dgvithoulkas
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Understandable, Iíd consider that a last resort if I canít do it myself. Rather not leave my fully built car in the hands of people who can barely even drive stick. Most people who drive well canít even drive my car as first grabs instantly and the twin disk is very difficult.

That being said, Iím no lamen when it comes to working on cars just electrical and audio have not been my forte. I understand inputs and placement etc. Anywho, I believe I started with stereo hifi. As I believe top-hifi was 2011 and on. I have tweeters but no center speaker. Plus Iíd prefer to be a little more in tune with how the audio is setup. So if you have any input that would be greatly appreciated.

As you may somewhat see, ďremoteĒ pink comes from stereo unit, plugs into LC6, which goes to first amp, then thereís another return that takes it from the second amp back to LC6. I thought that didnít make much sense as well as the remote feature is what tells them to turn on correct? Wouldnít it be simpler to go straight to the amp then the other way around? Wiring setup is something to tackle another day anyways.

I was thinking maybe the stereo unit could be on its way out. Or maybe remote that plugs in behind has came loose but havenít had the time to pull things apart and get behind it as I planned earlier.

Standing by.
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      05-18-2019, 01:13 AM   #4
ctuna
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2010 to 2011.5 Was the year that the US got the base system
with no amp. A lot of people try to modify this system.
It has special problems when trying to upgrade.
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      05-18-2019, 04:13 AM   #5
dgvithoulkas
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Quote:
Originally Posted by ctuna View Post
2010 to 2011.5 Was the year that the US got the base system
with no amp. A lot of people try to modify this system.
It has special problems when trying to upgrade.
Understood, any specific issues that might relate to my situation?
As I said previous, nothing changed aside from one time pulling up to the restaurant car jerked heavily and music just cut and played ďhalfwayĒ if you will. So speakers obviously not getting power and no bass because of no power to the amp, insight to these problems? First time Iíve had issues since last year, where similar issue occurred but ďfixed itself ď over a couple days. Goes out and before I make time to source or figure it out sound and power fully restores.
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      05-18-2019, 07:06 PM   #6
ctuna
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My guess is the guy used the LCI so he could use speaker out's
So tracing back through the wiring you could use a small speaker
to test the outputs of the head unit. Then the LCI would be the next
thing . If you haven't done this sort of thing it's not something I
would recommend.
Drawing a Diagram of the wiring and labeling all Inputs and outputs
might be a good place to start.
Checking all wiring connections and voltage to amps might be a good first check.
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