1990 525i stereo wiring problems..... - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-09-2006, 11:00 PM
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1990 525i stereo wiring problems.....

Ok, i just bought a 1990 525i and the stock stereo wiring was already chopped up, no plugs or anything, everything just taped together. I'm trying to install a pioneer 6400 HU that is giving me a hell of a time. I've searched and searched for wiring diagrams and stuff and the best i cam across is the thread that is a little further down this page. From what I can tell it has the old wiring.

yellow
blue
yellow/black
blue/black

black striped
white
white/purple
brown
2 brown/orange twisted together


I've been going by this thread Here and it sounds just like mine, but i can't find the grey for memory and i have no idea what the brown/orange 2 wires are for. Any help would be much appreciated cause this whole driving in silence is starting to drive me nuts... THANKS guys
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#2 (permalink) Old 10-09-2006, 11:02 PM
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Oh yeah and i've tested for constant 12v with no luck, I can only find the white/purple which is switched 12v.
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#3 (permalink) Old 10-10-2006, 01:15 AM
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LOL! It is just like yours. The orange and brown is the ground, which originally went to the back chassi of the stock unit. These will need to got the black wire on your new unit's harness. The (memory) wire is YELLOW, originally went to a grey plug along with the dimmer (white) wire (not needed), The yellow memory wire goes to the yellow on your new harness. If it was cut off, look further into your harness, it has to be there somewhere.

If you need further assistance, post hear again and I, or Da Bull, the 12V God, my mentor, can walk you through it. Good Luck.
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#4 (permalink) Old 10-10-2006, 04:32 AM
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Awesome! Thanks alot, I just figured it out thanks to your help. The brown/orange and the yellow memory wire were the key to all my problems. The only two plugs that were left on my harness were yellow and white to grey plug and the 12v/ground black plug. I guess the previous owner wasn't too worried about his stereo reseting everytime he turned off the car... oh well... And thanks again, very much appreciated.
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#5 (permalink) Old 10-10-2006, 05:56 AM
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Quote:
Originally Posted by jnstrcklnd
LOL! It is just like yours. The orange and brown is the ground, which originally went to the back chassi of the stock unit. These will need to got the black wire on your new unit's harness. The (memory) wire is YELLOW, originally went to a grey plug along with the dimmer (white) wire (not needed), The yellow memory wire goes to the yellow on your new harness. If it was cut off, look further into your harness, it has to be there somewhere.

If you need further assistance, post hear again and I, or Da Bull, the 12V God, my mentor, can walk you through it. Good Luck.
lol I have taught you well, young grasshoppa...



-There are 10 kinds of people. Those who understand binary, and those who do not.

-If we ever forget that we are One Nation Under God, then we will be a nation gone under...Ronald Reagan
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#6 (permalink) Old 10-10-2006, 05:57 AM
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Quote:
Originally Posted by Yakker
Awesome! Thanks alot, I just figured it out thanks to your help. The brown/orange and the yellow memory wire were the key to all my problems. The only two plugs that were left on my harness were yellow and white to grey plug and the 12v/ground black plug. I guess the previous owner wasn't too worried about his stereo reseting everytime he turned off the car... oh well... And thanks again, very much appreciated.
Glad he got ya goin', to the forums btw...



-There are 10 kinds of people. Those who understand binary, and those who do not.

-If we ever forget that we are One Nation Under God, then we will be a nation gone under...Ronald Reagan
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#7 (permalink) Old 10-10-2006, 02:04 PM
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Thanks for the welcome, this is definetly my favorite bimmer forum so far.
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#8 (permalink) Old 10-10-2006, 06:04 PM
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Quote:
Originally Posted by Yakker
Awesome! Thanks alot, I just figured it out thanks to your help. The brown/orange and the yellow memory wire were the key to all my problems. The only two plugs that were left on my harness were yellow and white to grey plug and the 12v/ground black plug. I guess the previous owner wasn't too worried about his stereo reseting everytime he turned off the car... oh well... And thanks again, very much appreciated.
Im glad I could be of assistance. You are most definetly welcome.
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#9 (permalink) Old 10-10-2006, 06:05 PM
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We are all pretty peaceful, stick around for a few thousand posts. Check out the Member's Lounge too, thats where most of the strange and unexplained happen, then you can come back in here for some sanity...



-There are 10 kinds of people. Those who understand binary, and those who do not.

-If we ever forget that we are One Nation Under God, then we will be a nation gone under...Ronald Reagan
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#10 (permalink) Old 10-10-2006, 06:05 PM
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lol I have taught you well, young grasshoppa...
LOL! Thanks. I couldn't have done it without you!!
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#11 (permalink) Old 08-15-2011, 03:22 PM
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Thumbs up Thanks Guys!

Just a note to let you know this is still a valuable thread! Same story here. Just bought my first BMW a 1990 525i and the stereo was there but all wires cut and I used this thread. The wire colors on yakkers SONY are exactly the same wires on the JVC I got.

Thanks for sharing your vast knowledge!
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#12 (permalink) Old 08-17-2011, 06:57 PM
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Hi everyone i just became the proud new owner of a 91 535i 5speed island green/parchment int. The car has 106k on it and is in immaculate condition. I previously owned 2 e30s but am getting out of them for a bit bc of needing a bigger car.

Here's my radio problem everything in the car is original so it has the am/fm cassette radio with 10 speakers and amp. The sound cuts out alot like ill have the radio on and it will crackle then no sound. Has anyone else had this problem? Im thinking its something to do with the amp or a wire going to the amp because the headunit stays powered fine just no sound. Also another thing to mention is that when the ignition is off the radio will stay on unless you turn it off by the knob. Any help would be appreciated thanks
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