BMW K bikes (Bricks)

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1Back to top Go down   Speedometer bench testing Empty Speedometer bench testing on Fri Jul 19, 2013 7:32 pm

hotpuppy

hotpuppy
active member
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I had a gear go bad on the odometer.  Took it apart after reading various posts and articles.  Only one gear appeared to be damaged/deteriorated, so I replaced just that gear.  Unfortunately, in the process of taking the bad gear out I decided that the speedo face had to be removed.  I now need to put the needle back on and I'd like to calibrate the speedometer with Karamba.

I need to know which pins do what on the back of the speedo. I reassembled it with the needle pointing to zero... not sure if that will be right or not. Has anyone else had to remove the needle and put it back? Is there a special procedure or process for this (it's a BMW after all)?

I've seen posts elsewhere that suggest I should find
12v+
sensor in
sensor out (wtf? really?)
ground.

I'm just not sure which direction is which and don't want to gamble or disassemble it far enough to get the board out for examination.

I really think it's +, sens, ground after looking at the connector.

Speedometer bench testing <a href=Speedometer bench testing 2013-011" />

and here's how I hold the speedo assembly... a $28 vise from Amazon....
Speedometer bench testing <a href=Speedometer bench testing 2013-012" />

    

2Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Fri Jul 19, 2013 8:47 pm

RicK G

RicK G
VIP
VIP
Here ya are a schematic to ponder
Speedometer bench testing Speedo10


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

3Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Fri Jul 19, 2013 9:09 pm

hotpuppy

hotpuppy
active member
active member
interesting, makes it seem like ground, 12v, signal.

    

4Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Fri Jul 19, 2013 9:54 pm

RicK G

RicK G
VIP
VIP
Knew I had it somewhere the big challeng is finding it on my contraption
Pinout for K Instruments
1 - Red/White - Clock Power (other stuff too)
2 - Yellow/White - Gear Position Switch
3 - Yellow/Black - Gear Position Switch
4 - Yellow/Blue - Gear Position Switch
5 - Black/Green - Starter Switch(12V if 2, 3 &4 are grounded - gear=0)
6 - Green/Black - Power
7 - White - Low fuel lamp
8 - Green/Yellow - ABS Warning Relay
9 - Blue - Alternator
10 - Violet/black - Temp relay
11 - Brown/Green - Oil light
12 - Violet/White - Choke indicator
13 - Brown - Ground
14 - White/Blue - Bulb monitor
15 - White - High beam
16 - Black/Blue - Tachometer
17 - Blue/Black - Right turn indicator
18 - Brown - Ground
19 - Blue/Red - Left turn indicator
20 - -
21 - Blue/Green - Turn signal cancel on flasher relay
22 - Yellow - Speed Sensor
23 - Brown - Ground
24 - Gray/Blue - Backlights


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

5Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Fri Jul 19, 2013 10:50 pm

hotpuppy

hotpuppy
active member
active member
Hmm. 6 and 23 checkout...but the multimeter says 21 goes to the speedo. I will try again later. I couldn't get anything out of it with karamba. I was going to put it in the bike and try again.

    

6Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Fri Jul 19, 2013 10:51 pm

hotpuppy

hotpuppy
active member
active member
Hmm. 6 and 23 checkout...but the multimeter says 21 goes to the speedo. I will try again later. I couldn't get anything out of it with karamba. I was going to put it in the bike and try again.

    

7Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Sat Jul 20, 2013 1:36 am

robmack

robmack
Life time member
Life time member
Karamba tutorial

About halfway down, RickG posted the pins for bench testing -- 6, 22, 23.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

8Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Sat Jul 20, 2013 1:38 am

hotpuppy

hotpuppy
active member
active member
@robmack wrote:Karamba tutorial

About halfway down, RickG posted the pins for bench testing -- 6, 22, 23.
I saw that... .and posted back that when I traced the pins with a multimeter 6 and 23 matched his recommendation, but 22 did not. I plan to recheck it, but thought it was odd. I'm not sure if the instrument cluster was original anyway. I thought I saw a date on it that was much newer than the bike.

    

9Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Sat Jul 20, 2013 7:49 am

Crazy Frog

Crazy Frog
admin
admin
This one can be found in the Download page Smile

Speedometer bench testing Instrument%20cluster%20plug

CF


__________________________________________________
Speedometer bench testing Frog15Speedometer bench testing Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

10Back to top Go down   Speedometer bench testing Empty Re: Speedometer bench testing on Sat Jul 20, 2013 3:34 pm

hotpuppy

hotpuppy
active member
active member
@Crazy Frog wrote:This one can be found in the Download page Smile

Speedometer bench testing Instrument%20cluster%20plug

CF

 i saw that one as well.  What are 21, 22, and 23?

I'm pretty sure that I zapped the speedo electronics because it wasn't working when I did my test ride today.... dammit.  Smile

    

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