BMW K bikes (Bricks)

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1Back to top Go down   K75 ABS wiring? Empty K75 ABS wiring? Thu Dec 24, 2020 1:52 pm

roach374

roach374
Silver member
Silver member
Just cracking open my 1993 K75 project bike, and I need some help decyphering the ABS wiring (there doesn't seem to be anything in the wiring diagram or shop manual about ABS). 

The previous owner seems to have disconnected the ABS (which is fine, I don't need it), but this thing was in the panniers:
K75 ABS wiring? RUFUQsg K75 ABS wiring? C7jrywS

...and there seems to be a matching connector / cable bundle tucked away in the tail-end storage compartment. Is this the ABS control unit? Is there a wiring diagram or shop manual somewhere for the K75 ABS?

And if it's *not* the ABS unit, then what's the connector in the "trunk" for?
K75 ABS wiring? OnyX5jL

    

2Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 1:57 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Go to a website such as www.realoem.com/bmw and type in the last seven digits of the BMW part number which is stamped onto the part, in this case 1 459 699, and you'll see that it is the ABS control module as you guessed. Does the plug fit it? There you go.

The Google Gods will tell you a lot about BMW wiring diagrammes if you give it a healthy search, with images, in most cases. Also, try the forum's search engine on the 'Portal' page.


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, #1 '06 K1200R, #2 '06 K1200R, '07 K1200R, '09 K1300GT, '13 R1200RT-P & 2022 S1000XR

"Do you ever read any of the books you burn?" "That's against the law!" "Oh, of course."
~Ray Bradbury, science-fiction writer (22 August 1920 - 2012)
    

3Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 2:01 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Yes, that is the ABS "brain".  It is mounted in the tail cowl on the first generation ABS(ABS1).  

As far as wiring diagrams, if you have a Clymer shop manual, you will find them on pages 716 and 717.



Last edited by Point-Seven-five on Thu Dec 24, 2020 2:12 pm; edited 2 times in total


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 2:06 pm

roach374

roach374
Silver member
Silver member
Two Wheels Better wrote:Go to a website such as www.realoem.com/bmw and type in the last seven digits of the BMW part number which is stamped onto the part, in this case 1 459 699, and you'll see that it is the ABS control module as you guessed. Does the plug fit it? There you go.

The Google Gods will tell you a lot about BMW wiring diagrammes if you give it a healthy search, with images, in most cases. Also, try the forum's search engine on the 'Portal' page.

Thanks, TWB. I've done all of that. Like I mentioned, the K75 wiring diagram from the tech page makes no mention of ABS. Realoem also doesn't seem to have it (I was searching by my bike model, instead of by part number!), neither does the [url=https://www.kforum-tech.com/Manuals/BMW Manual K75-K100 2-Valve.pdf]shop manual[/url] (although it mentions looking at the K1100 manual for ABS1.).

BUT, I did google the part number off the mystery box, and it is indeed the ABS unit, which is all I need to know. Thanks!



Last edited by roach374 on Thu Dec 24, 2020 2:12 pm; edited 4 times in total

    

5Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 2:06 pm

roach374

roach374
Silver member
Silver member
Point-Seven-five wrote:Yes, that is the ABS "brain".  It is mounted in the tail cowl on the first generation ABS(ABS1).  

As far as wiring diagrams, if you have a Clymer shop manual, you will find them on pages 716 and 717.

Excellent, thanks! My Clymer's is still in the mail, so I'll check it out when it gets here.

    

6Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 2:13 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Should you want to remove the wiring, it's not that bad of a job if you do it as part of a frame up rebuild of the bike.

The ABS wiring is pretty independent of the rest of the bike's wiring, and as such, if you are willing to unwrap the harness, remove the ABS wiring, and rewrap the harness, it is a fairly straightforward task that can be done in an afternoon or two without a lot of mental effort.

I did it on one of my bikes as part of cleaning up the connectors, etc. Was pretty easy.


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

7Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 2:15 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Removing the ABS will make removing the rear mudguard to allow wheel removal a lot easier.


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

8Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Thu Dec 24, 2020 4:15 pm

Laitch

Laitch
Life time member
Life time member
Two Wheels Better wrote:The Google Gods will tell you a lot about BMW wiring diagrammes if you give it a healthy search, with images, in most cases. Also, try the forum's search engine on the 'Portal' page.
roach374 wrote:Thanks, TWB. I've done all of that.
Not quite all of that, at least with regard to Google god worship.  Laughing  Resources abound.
There's an ABS overview manual in the link at the bottom of this post.
The ABS component wiring is depicted in a wiring diagram in the link at the bottom of this post.
There's a concise description of the system at this site.

Plus, there might be valuable prizes available for those who collect the whole set because there's more out there. Laughing


__________________________________________________
1995 K75 81,000 miles
K75 ABS wiring? Usa-lo10
    

9Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Fri Dec 25, 2020 3:01 pm

roach374

roach374
Silver member
Silver member
Laitch wrote:
Two Wheels Better wrote:The Google Gods will tell you a lot about BMW wiring diagrammes if you give it a healthy search, with images, in most cases. Also, try the forum's search engine on the 'Portal' page.
roach374 wrote:Thanks, TWB. I've done all of that.
Not quite all of that, at least with regard to Google god worship.  Laughing  Resources abound.
There's an ABS overview manual in the link at the bottom of this post.
The ABS component wiring is depicted in a wiring diagram in the link at the bottom of this post.
There's a concise description of the system at this site.

Plus, there might be valuable prizes available for those who collect the whole set because there's more out there. Laughing

Great stuff, Laitch, thanks!

    

10Back to top Go down   K75 ABS wiring? Empty Hats off to those working on the ABS Fri Feb 05, 2021 1:31 am

webgraphiks

webgraphiks
New member
New member
good luck man, you're a bolder person than me

    

11Back to top Go down   K75 ABS wiring? Empty Re: K75 ABS wiring? Fri Feb 05, 2021 4:50 am

Ringfad

Ringfad
Life time member
Life time member
Test question for all the ABS experts (I do have the correct answer).

How many wheel sensor pulses are required before the system is activated

A. 50
B. 150
C. 250
D. 500

No prizes for this one.


__________________________________________________
K75 ABS wiring? Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 60K Km     ;BMW;  K1100RS Black 1996       ;BMW; K1 Blue 1990 25K Miles
    

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