1990 525i stereo wiring problems..... - BMW Forum

Yakker · 10-09-2006, 11:00 PM

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

Yakker · 10-09-2006, 11:02 PM

Oh yeah and i've tested for constant 12v with no luck, I can only find the white/purple which is switched 12v.

jnstrcklnd · 10-10-2006, 01:15 AM

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.

Yakker · 10-10-2006, 04:32 AM

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.

da_bull · 10-10-2006, 05:56 AM

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...

da_bull · 10-10-2006, 05:57 AM

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...

Yakker · 10-10-2006, 02:04 PM

Thanks for the welcome, this is definetly my favorite bimmer forum so far.

jnstrcklnd · 10-10-2006, 06:04 PM

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.

da_bull · 10-10-2006, 06:05 PM

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...

jnstrcklnd · 10-10-2006, 06:05 PM

Quote:

Originally Posted by da_bull

lol I have taught you well, young grasshoppa...

LOL! Thanks. I couldn't have done it without you!!