Bmw e39 business radio dashboard volume control knob doesnot adjust volume 2002 in the year. any suggestions?

fuse box diagrams

BMW 5-Series (E39; 1996 - 2003) - fuse box diagram ...

https://www.autogenius.info > bmw-5-series-e39-1996-...
Aug 26, 2018 - BMW 5-Series (E39; 1996 - 2003) - fuse box diagram. Year of production: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 ...
Missing: 740il ‎' Must include: 740il

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  BMW 3 Series E36 and E35/5 (1990 - 2000) - fuse box ...

  https://www.autogenius.info > bmw-3-series-e36-and-e...
  May 28, 2018 - BMW 3 Series E36 and E35/5 (1990 - 2000) - fuse box diagram · Front power distribution box · Relay carrier under LH side of dash · Connector strip ...
  

Picture & amperage & description of every single fuse ...

https://www.bimmerfest.com > ... > E39 (1997 - 2003)
Mar 1, 2013 - There are SIX fuse box locations in my 2002 BMW 525i E39 (here is a 1997 540i fuse location chart):. EF1 to EF5 <= at the back of the ebox ...

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Could be an open fuse

get your car fix right now
1997 2002 BMW 5 Series E39 Service Repair Workshop Manual Download 1997...

http://www.e38.org/e39/BMW_E39_Radio_OBC_MID_Manual.pdf

http://www.e38.org/e39/BMW_E39_Radio_OBC_MID_Manual.pdf

Hi.. my radio/satnav is turing on but it freezes on bmw logo and turns back off... any suggestions?

Thanks

It means that parked car ventilation is activated.

Here's a link to the owners Manual too if you need it.

BMW 5 Series (E39) Service Manual: 1997-2002
2003 ' Bentley Publishers ' English ' ISBN: 083760317X ' Pages 1002 ' File type: PDF ' 44.37mb

This Bentley Manual is the only comprehensive, single source of service information and specifications for BMW 5 Series (E39) cars from 1997-2002. Whether you're a professional technician or a do-it-yourself BMW owner, this manual will help you understand, maintain, and repair every system on 5 Series cars.

BMW 5 Series (E39) Service Manual: 1997, 1998, 1999, 2000, 2001, 2002
525i, 528i, 530i, 540i Sedan, Sport Wagon.

blaupunkt doesn't supply parts after ten years on their decks. you can try salvage yards.

Do you get a loud HISS when you turn up the volume?

If not then the problem is probably on the output side of the radio, quite often the  connection to the speakers.

Check the wiring connections at the rear.

If you do not get any hiss then it is probably a faulty radio or it might require a code.

Do you have the code?

If you have the code , disconnect the battery supply to the radio (via a fuse or battery terminal) for 10 minutes, reconnect ....then enter the code

If you do not have the code , then POST A NEW QUESTION

quoting all the LETTERS+NUMBERS etc on the radio casing

I know what you mean. Used to be a source of irritation in this otherwise super-quiet car. It was like "hey... the music plays far too loud now please drive a little slower dad". Really irritating on the Autobahn, constantly fiddling on that volume knob.

Interestingly, the instruction manual for the business CD main unit gave no clues at all! Then I found the solution at the bimmerfest BMW forum:

"
1.Power down the unit (using the knob) and power back up in the radio mode
(either AM or FM).
2. Hold down the "m" button (right of the display) until your display shows
a serial # xxxxxxxxxxx.
3. Using the "+" or "-" buttons that surround the center "musical note
symbol" button to the left of your display, scroll until "GAL 3" comes up,
which is factory setting. Using the number buttons 1 thru 6 below your
display, press the number "1". Your display will now read "GAL 1 ".
4. Power down the unit again (using the knob) and when you power back up,
your new setting will be effective!
5. To confirm that the new setting is active, repeat steps 2 & 3 to check
your "GAL" setting.
6. Enjoy your HK unit's volume the way YOU want to hear it!
"

I assume there are slightly different versions of this in different models but it goes something like this, the keyword you are looking for in the menu system is "GAL" which is a German acronym for speed-sensitive volume control (Geschwindigkeitsabhängige Lautstärkenregelung für Radio).

Good luck!