BMW K bikes (Bricks)

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1Back to top Go down   Ignition switch replacement Empty Ignition switch replacement Thu Nov 04, 2021 5:10 am

ouafnico

ouafnico
active member
active member
Hi all,

My K100 got an ignition switch and keys are... in a very bad shape.

I'm trying to find a ignition key replacement part.
I saw the actual connector use 4 wires.

Is anyone have found a compatible piece for your "builds" ?
I saw some basical ignition keys with 4 wires too but don't know if it's going to work..


Thanks Smile

    

2Back to top Go down   Ignition switch replacement Empty Re: Ignition switch replacement Thu Nov 04, 2021 6:17 am

Dai

Dai
Life time member
Life time member
Those aftermarket ignition switches will not work. BMW seem to have used a switching configuration that is unique to them. What you can do is to use an aftermarket switch and:

- connect red to red
- green to green
- cut off the black and black-white wires on the new switch
- link the slate and slate/blue wires together on the original loom (slate = grey. It is called 'slate' so that on a wiring diagram it shows up as S, rather than G or Gr which can cause confusion with green).

What this will mean is that the pilot light and tail lights will be permanently on when you turn on the ignition, but as you are in France, I can't see that being a problem.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

3Back to top Go down   Ignition switch replacement Empty Re: Ignition switch replacement Thu Nov 04, 2021 6:28 am

ouafnico

ouafnico
active member
active member
@Dai wrote:Those aftermarket ignition switches will not work. BMW seem to have used a switching configuration that is unique to them. What you can do is to use an aftermarket switch and:

- connect red to red
- green to green
- cut off the black and black-white wires on the new switch
- link the slate and slate/blue wires together on the original loom (slate = grey. It is called 'slate' so that on a wiring diagram it shows up as S, rather than G or Gr which can cause confusion with green).

What this will mean is that the pilot light and tail lights will be permanently on when you turn on the ignition, but as you are in France, I can't see that being a problem.

Many thanks for this quick reply.

So I can just get an aftermarket switch with 2 wires. I'm just checking what model can be a minimal waterproof.

Indeed if I got the lights permanently on, in France it's not a problem, more like an obligation today :p

    

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