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lotusrossOffline
Post subject: BMW V12 wiring diagrams  PostPosted: Oct 22, 2007 - 11:57 PM
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Hi,

Does anyone have the BMW 750 wiring diagrams - not the trouble shooting diagrams, but the actual wiring diagrams that state where and what each wire does.
 
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jdinnerOffline
Post subject: RE: BMW V12 wiring diagrams  PostPosted: Oct 23, 2007 - 04:07 AM
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It is easy enough to figure out what each wire does by reading the Trouble Shooting Diagrams found at http://www.e38.org/e32/

I have not come across a guide that answers questions.

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flyhilandsoft
Post subject:   PostPosted: Oct 25, 2007 - 03:30 AM
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How about the 850CI wiring diagrams? Are they also available?

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swittaOffline
Post subject:   PostPosted: Oct 25, 2007 - 04:05 AM
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here
http://shark.armchair.mb.ca/~dave/BMW/e31/
 
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flyhilandsoft
Post subject:   PostPosted: Oct 25, 2007 - 05:24 PM
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Excellent, Thank you!

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lotusrossOffline
Post subject:   PostPosted: Oct 26, 2007 - 05:47 PM
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Thanks for the help guys, but what I am looking for is a detailed wiring diagram of what does what. These diagrams that are linked are good, but are they the same ones that are in the Bentley Manual?

For example, a wiring diagram that shows what each wire out of the ECU's does. I know for a fact that the 3 ECU's are connected to each other - but what position in which ECU goes to what?

The trouble shooting diagrams don't show that. They only say - To DME. Where in the DME's do they go?

What I have is a BMW V12 in my Lotus Esprit - and what I don't need - I am going to cut out. I had to relocate the ECU's.

Does anyone have copies of the Bentley Manual or the BMW AG wiring diagrams?
 
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jdinnerOffline
Post subject:   PostPosted: Oct 26, 2007 - 10:39 PM
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I had to read every page of the manual and record each and every wire for what it does. I reverse engineered the manual to do what you are asking for my engine. I could not find the manual you are asking for. Read every page and record the circuits you need. The X20 and X21 are the main connectors that you should focus on. Inside the E-box there is an 8 wire connector that connects to the transmission. These three connectors are the only connections between the car and the engine. This totals 58 or 48 wires depending on the year of your car. I was able to narrow it down to 3 to make the engine run. Other wires are needed too like tach, throttle potentiometer, fuel pump, check engine light, eml light, o2 sensor heater to name most of them.
Take the time to study it, you will be glad you did.

Jim

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lotusrossOffline
Post subject:   PostPosted: Oct 28, 2007 - 11:20 PM
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Thanks, I am actually looked it over in detail again, and I am starting to make more sense of it.

Thanks again.

Jason Ross
 
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santarosamgbOffline
Post subject:   PostPosted: Mar 31, 2015 - 06:42 PM
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Hi Jimdiner, I want to do a 750 v12 engine conversion. Could you please help me by pointing out where these three wires that u were prefering to that would make the engine run? I appreciate very much,
 
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AdrianBurtonOffline
Post subject:   PostPosted: Mar 31, 2015 - 07:36 PM
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her you go

http://jimdinner.wordpress.com/

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lambo1Offline
Post subject:   PostPosted: Apr 03, 2015 - 10:32 AM
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Guys I also bought Jims download, best thing I ever did , just need the time to seriously attack the wiring, jim breaks it down so its easier to understand.
It also comes with this info from Simon
http://www.v12diablo.co.uk/resources/BMW%20V12%20Using%20OEM%20ECU%27s.pdf
 
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santarosamgbOffline
Post subject:   PostPosted: Apr 04, 2015 - 07:19 AM
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Hi Lambo, I want to run my V12 with carburetors and a six speed transmission. I know jimdiner's set up was for an fuel injected engine with an automatic transmission. Does his CD or whatever covers engine conversion with carburetors? Thanks
 
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jdinnerOffline
Post subject:   PostPosted: Apr 04, 2015 - 12:52 PM
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santarosamgb wrote:
Hi Lambo, I want to run my V12 with carburetors and a six speed transmission. I know jimdiner's set up was for an fuel injected engine with an automatic transmission. Does his CD or whatever covers engine conversion with carburetors? Thanks


I have some drawings and written material on how I made my adapter plate, clutch and flywheel. As for carburetors, no. You will need to make intake manifolds to accept carbs. Also, you will need a distributor setup that will advance automatically if you don't go with computers. The stock distributors will not work for you as the DK motors will not be detected nor will injector feedback.

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santarosamgbOffline
Post subject:   PostPosted: Apr 04, 2015 - 04:24 PM
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Jim, Thanks for writing me back. I was told that distributor is not set up to control any advance. Can the original ECUs be simply manipulated to run with carburetors? Thanks,
 
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jdinnerOffline
Post subject:   PostPosted: Apr 05, 2015 - 02:38 PM
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santarosamgb wrote:
Jim, Thanks for writing me back. I was told that distributor is not set up to control any advance. Can the original ECUs be simply manipulated to run with carburetors? Thanks,


If you're set on using carbs I suggest you install two 6cyl vacuum/mechanical advance distributors on the ends of the cam shafts. That is the easiest way to get it to work.

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