BMW K bikes (Bricks)


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1Back to top Go down   3 white wires under engine  Empty 3 white wires under engine Wed Dec 14, 2022 11:04 pm

Garyk100

Garyk100
Gold member
Gold member
Just tidying up some wiring on 16v k100, I think the bike had an alarm before I bought the bike, I have three white wires I can trace as far back to above the centre stand, not sure if they are original as they have joins with tape, odd connector and a soldered wire,3 white wires under engine  1ddd1510
3 white wires, 1 doubles back on itself, one goes to a connector and the other I cut so as to reroute the wires from rubbing on the centre stand I will put a proper connector on it.
3 white wires under engine  C4c79110
The wire that comes from the connector goes to the top fuse in the fuse box.
3 white wires under engine  Fb0aa010
The cut wire goes to the “connector above” that connects to nothing.
3 white wires under engine  088cc710
The other wire from the “connector above” goes to whatever the thing is mounted to the front of the battery holder.
Any help appreciated

    

2Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Thu Dec 15, 2022 12:14 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Sidestand switch?


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

3Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Fri Dec 16, 2022 12:33 am

Garyk100

Garyk100
Gold member
Gold member
I looked at the side stand has no wires or a switch that I can see, bike starts with the stand up or down, the bike also runs if I disconnect the wires, I will attempt to follow the wires, 😃


__________________________________________________
The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
    

4Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Fri Dec 16, 2022 12:46 am

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
One of the white cable looks like its going to a relay in photo two  
  • What terminal position is it connected to? 
  • I'm not across the layout of the relays on the 16v Version but do you know what that relay is doing ?     


__________________________________________________
1986 K100 RS Motorsport
1988 K100 RS SE
1990 K1 known as Barn Find 
2004 F650 GS known as DACK-DACK
 
#### K100 RS Project 
2011 R1200 GS known as Big Blue 
    

5Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Fri Dec 16, 2022 12:57 am

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
3 white wires under engine  Relay_10

Its looks like you have an additional Relay so I would be trying to work out what / where its being controlled from

As you mentioned it might be any of the following 
  • An alarm 
  • An early camera   
  • An early radar detector 
  • An early heated vest          


__________________________________________________
1986 K100 RS Motorsport
1988 K100 RS SE
1990 K1 known as Barn Find 
2004 F650 GS known as DACK-DACK
 
#### K100 RS Project 
2011 R1200 GS known as Big Blue 
    

6Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Fri Dec 16, 2022 1:01 am

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
Do you have ABS on your bike  ?


__________________________________________________
1986 K100 RS Motorsport
1988 K100 RS SE
1990 K1 known as Barn Find 
2004 F650 GS known as DACK-DACK
 
#### K100 RS Project 
2011 R1200 GS known as Big Blue 
    

7Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Fri Dec 16, 2022 5:53 am

Garyk100

Garyk100
Gold member
Gold member
No abs, was not all there when I bought it, I removed the rest, the wire in pic 2 is spliced into another wire that connects to the top fuse in the fuse box, I need to remove the rear end to clean the sensor as the bike is in 3rd all the time and no neutral light, I will do that soon and I will hopefully be able to trace the origins of the wires, thank you for the reply, it’s the people and all the posts that give me the confidence to maintain my K, cheer’s


__________________________________________________
The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
    

8Back to top Go down   3 white wires under engine  Empty 3 White wires Wed Dec 21, 2022 4:09 pm

Kr4mo

Kr4mo
active member
active member
Garyk100 wrote:Just tidying up some wiring on 16v k100, I think the bike had an alarm before I bought the bike, I have three white wires I can trace as far back to above the centre stand, not sure if they are original as they have joins with tape, odd connector and a soldered wire,3 white wires under engine  1ddd1510
3 white wires, 1 doubles back on itself, one goes to a connector and the other I cut so as to reroute the wires from rubbing on the centre stand I will put a proper connector on it.
3 white wires under engine  C4c79110
The wire that comes from the connector goes to the top fuse in the fuse box.
3 white wires under engine  Fb0aa010
The cut wire goes to the “connector above” that connects to nothing.
3 white wires under engine  088cc710
The other wire from the “connector above” goes to whatever the thing is mounted to the front of the battery holder.
Any help appreciated
The only thing I've seen on the K bikes with 3 (actually 4) white wires was the O2 sensor in the exhaust.  See if you can trace it down to that.

    

9Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Wed Dec 21, 2022 4:33 pm

Garyk100

Garyk100
Gold member
Gold member
The original exhaust and the 2 I have or had did not have the sensor, I will keep looking, got a few things to do before I get to the wires, not looking forward to cleaning the gear position switch, I keep finding other bits to tidy up, thanks for the answers everyone


__________________________________________________
The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
    

10Back to top Go down   3 white wires under engine  Empty 3 white wires Wed Dec 21, 2022 9:59 pm

daveyson

daveyson
Life time member
Life time member
Some people don't like side stand switch safety feature, and bypass it. What is the colour of the wires to and from the fuse?


__________________________________________________
11/1985 BMW K100RT (late model)  Vin. 0090567
 ~120,000 km
    

11Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Wed Dec 21, 2022 11:58 pm

duck

duck
Life time member
Life time member
daveyson wrote:Some people don't like side stand switch safety feature, and bypass it. What is the colour of the wires to and from the fuse?

You only need one wire to do that.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

12Back to top Go down   3 white wires under engine  Empty 3 white wires Thu Dec 22, 2022 2:19 am

daveyson

daveyson
Life time member
Life time member
The bike starts with the stand up or down, and runs with the wire to the plug disconnected. The engine should stop with the side stand down while in gear. Not familiar with 4V bricks but my Vulcan was like that (or in gear with the clutch in, but then would stall as the clutch was released) Just double checking about the wiring colours though.

The plug might be for an alarm or battery charger or stuff I think of as unimportant, so I'd think of just removing the unnecessary stuff.


__________________________________________________
11/1985 BMW K100RT (late model)  Vin. 0090567
 ~120,000 km
    

13Back to top Go down   3 white wires under engine  Empty Re: 3 white wires under engine Thu Dec 22, 2022 4:18 am

Garyk100

Garyk100
Gold member
Gold member
I agree I don’t think the wires are important it probably had an alarm, the wires are not original and how they are connected is not factory, thanks for all the answers, if I work out what they are I will post it, cheers everyone


__________________________________________________
The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
    

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