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7 Series - E23 / E32 (1977 - 1994)

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Old 01-29-2012, 02:43 PM
Jessecook92 Jessecook92 is offline
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Location: Modesto, CA
Join Date: Nov 2011
Posts: 14
Mein Auto: 1992 BMW 735i
Aftermarket stereo wiring

When I bout my car it came with a DVD player. I took it out to replace the lights on my obc (I bought the bulbs for it from autozone $5 for two. I tried to solder them on but couldn't get it thin enough so I just put the metal pieces back in the plastic and shoved the new bulb in and it was a nice tight fit and still works). The wiring was a total mess!!! Anyway.. I have a few questions.
The main power wire doesn't have a fuse on it like the manual says it should. I had a dead battery and had jump started my car multiple times and now my screen flickers. Is it because it was missing the fuse and jumpin the car messed it up? And should I install a fuse?
Next I have the prerun wires for the 6 disk changer and wanted to put one in but my stereo has nowhere to plug it in. Do I have to splice the wires, buy some kind of adapter? Or should I just give up? Lol.
And lastly I have random wires that aren't connected can you tell me what they are?
These two are the same wore just different angle. Click image for larger version

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This is the same colore as another wire deep in the dash that isn't connected to anythingClick image for larger version

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Old 08-16-2013, 08:42 AM
Delwynne Delwynne is offline
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Location: North Carolina
Join Date: Jun 2013
Posts: 6
Mein Auto: 1994 740i e32
Any resolution to your electrical problem? Had the same issue with radio draining my battery. I ended up pulling my radio fuse - under rear seat - which deactivated my alarm system as well. I'm still searching for answers.
Wish you luck.
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Old 08-24-2013, 01:26 AM
BMWFatherFigure's Avatar
BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
Join Date: Aug 2012
Posts: 4,106
Mein Auto: E23;E32;E34;E38;R50;R55
If you have a GOOD Car Audio Shop take the unit to them and they will be able to sort the wire uses out for you. With a Bentley you should be able to relate the wires you have to their uses in the car and take it from there. Remember you could have the factory 10 channel (no joke) amp in the boot (OK Trunk) behind the trim on the left side as you look in. The presence or absence of a fuse will not affect battery brain. Wrong wiring will.

The worst people to follow into a dashboard are radio installers; alarm/imobliiser installers; plumbers. They all seem to adopt the same lack of standard.
Good - Fast - Cheap: Pick any two.
3 x E32 735iL (Alpine White, Glacier Blue & Kashmir Beige); 2 X E38 735iL (Oxford Green & Alpine White); E53 X5 4.4i (Pearl Beige); R50 Cooper; R55 Cooper Clubman (Both Pure Silver).
E38 Parts Car
E21 318i; E23 735i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?

Last edited by BMWFatherFigure; 08-24-2013 at 01:28 AM.
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