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Old 06-22-2009, 12:35 PM   #1
ShaitanCR
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Help. Need to add manual swith to radio. K-BUS info

Ok. si I have the big BUS problem with the Business radio.

If you wanna read up on that, check these links :

http://forum.e46fanatics.com/showthr...408&highlight=

The only way the radio works without interfearing with the instrument cluster and turn signals and so on is by Removing the #7 fuse which is the BUS line connector between the radio and the car, The only problem with this is that the radio becomes indipendant and does not shut off completely when the car is off, The light or clock stay on, draining the battery !

Sooooo.what i want to do is add a switch or button that removed power to the radio manually. like a fuse does.

Eather just add a switch line to the POS line of the radio or to the Fuse line that connects the radio to the battery.

Any ideas? should i remove the radio and do this manually to the back line? or remove the fuse panel and add it to the fuse line, or maybe even do it to the main radio line to the battery?

Is it seperate or is it all connected to a mian battery line? if that is the case than i would haf to do it to the fuse line.

The connection would just be something to turn on and off the power to the radio. like a breaker siwtch

Thnks

The images are examples of the switches. The connection would be just POS/POS and Light(accessories).



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Last edited by ShaitanCR; 06-24-2009 at 01:11 PM. Reason: add to title for searching purposes !
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Old 06-22-2009, 03:56 PM   #2
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any ideas or suggestions? does anybody have a sketch on how to connect the switch ?

should it be Neg to ground and Pos to the cable that goes from battery to the fuse for the radio ?
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Old 06-22-2009, 05:22 PM   #3
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Would this work ? Placing the switch before the Positive cable from the battery reaches the fuse box ?

The Switch would work as A BRIDGE BETWEEN THE BATTERY AND THE RADIO FUSE !
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Old 06-23-2009, 10:32 AM   #4
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Anyone with any suggestions? I allready removed the Glovebox for easy access to the Fuses.
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Old 06-23-2009, 10:36 AM   #5
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Yikes why not just fix the problem????
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Old 06-23-2009, 10:40 AM   #6
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Quote:
Originally Posted by jbeurotech View Post
Yikes why not just fix the problem????
I have been looking at solutions for a while now. changing the radio is expensive and if i do i'll just add an after market one. The business radio is not the problem, the problem is the BUS link between the radio and other instruments. If i remove the FUSE for that BUS system than evrything works fine, except the radio is always ON draining the battery, sooo. simple solution, add a kill switch to the radio and eliminate the BUS link fuse for the radio.

problem solved...

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Old 06-23-2009, 10:51 AM   #7
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Originally Posted by ShaitanCR View Post
I have been looking at solutions for a while now. changing the radio is expensive and if i do i'll just add an after market one. The business radio is not the problem, the problem is the BUS link between the radio and other instruments. If i remove the FUSE for that BUS system than evrything works fine, except the radio is always ON draining the battery, sooo. simple solution, add a kill switch to the radio and eliminate the BUS link fuse for the radio.

problem solved...

Radio needs to see the bus link or it will read disabled........

How do you know its the bus line. Most issue's lie in one of the modules. Have you done any trouble shooting
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Old 06-23-2009, 10:56 AM   #8
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Quote:
Originally Posted by jbeurotech View Post
Radio needs to see the bus link or it will read disabled........

How do you know its the bus line. Most issue's lie in one of the modules. Have you done any trouble shooting
I have read allot about this issue and the BUS line is what other people with the same symptoms have had.

trouble shooting is all i have done. I have worn out all DIY fixes. The radio does read disabled when that fuse is in. the #7 ! and the turn signals don't work, and the seatbelt light stays on, and other things don't work. all of this goes away when i remove the #7 fuse !

I am opened to all options, i really dont whant to hack into the car. but i miss my music !

any suggestions?
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Old 06-23-2009, 11:14 AM   #9
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Have you gone to the K-bus splice and remopved the connectors one at a time till the issue goes away??? There was a post somewhere where i posted all the schematics
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Old 06-23-2009, 11:32 AM   #10
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Quote:
Originally Posted by jbeurotech View Post
Have you gone to the K-bus splice and remopved the connectors one at a time till the issue goes away??? There was a post somewhere where i posted all the schematics
hmmmm. this is new. can u find that thread for me? I dont even know where to start when you talk about K-bus splice. where are they located? any photos?

Thanks
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Old 06-23-2009, 11:36 AM   #11
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FOUND IT. i think !! http://forum.e46fanatics.com/showthr...=bus+diagnosis ! this is exactly my same problem...
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Old 06-23-2009, 11:45 AM   #12
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ok, i read the whole thread and am still a little confused, I am used to working on honda rice rockets and old beat up drag cars where everything is replaceable and not expensive. I don't wanna break something on the beemer and haf to spend a fortune to fix it.

where do i go on this link http://www.bmw-planet.com/diagrams/r.../e46/index.htm ??

thanks in advance jbeurotech !
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Old 06-23-2009, 11:50 AM   #13
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ok, i read the whole thread and am still a little confused, I am used to working on honda rice rockets and old beat up drag cars where everything is replaceable and not expensive. I don't wanna break something on the beemer and haf to spend a fortune to fix it.

where do i go on this link http://www.bmw-planet.com/diagrams/r.../e46/index.htm ??

thanks in advance jbeurotech !
Alright there we go now we are talking about fixing not hacking cars

In the link look at signals and find the K-bus you will see a -bus splice(under glove box) it is a comb type connector remove each wire till the bus comes "alive" then you found the issue.


Remember K-bus is a 12 volt bus pulled low for signals.

The igntion switch is one common isse on the K-bus. First check your voltage on the K0bus wire
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Old 06-23-2009, 12:02 PM   #14
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OK, signals, signals name with K, K-BUS K bus, I click on it and nothing happens!

do i haf to print it? what am i doing wrong? i am looking at the site with IE8
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Old 06-23-2009, 12:04 PM   #15
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I know this is the comb you are talking about...



I have allready seen it when i took out the glovebox and brought down the fusebox !
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Old 06-23-2009, 12:14 PM   #16
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I know this is the comb you are talking about...



I have allready seen it when i took out the glovebox and brought down the fusebox !
You need to use IE7 with SVG plug in and active x
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Old 06-23-2009, 12:20 PM   #17
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Instead of a switch, couldn't you just attach the wire you were going to add a switch to to an accessory power source?
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Old 06-23-2009, 12:21 PM   #18
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Instead of a switch, couldn't you just attach the wire you were going to add a switch to to an accessory power source?
hmmmmm. like what? and how?
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Old 06-23-2009, 03:16 PM   #19
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if you want to put a switch, i would do it after the fuse. although, i would much rather use a relay so that i don't have to manually turn it off everytime. just find another switch wire to use as a trigger.

hopefully you'll be able to fix it with jb's help.

you will need the battery connected if you're testing those wires for power.
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Old 06-23-2009, 03:18 PM   #20
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Quote:
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if you want to put a switch, i would do it after the fuse. although, i would much rather use a relay so that i don't have to manually turn it off everytime. just find another switch wire to use as a trigger.

hopefully you'll be able to fix it with jb's help.

you will need the battery connected if you're testing those wires for power.
thats what i thought. thanks ! I much rather try to fix the problem with BJ's help than hack at the wires and add a switch. thanks !
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