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Thread: R850R Electrical

  1. #1
    Registered User slime's Avatar
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    R850R Electrical

    So, I was in behind the dash ( scary stuff from a previous owner) and found a connection with a black, orange, and green/w a blue stripe wires. Anyone know what these might be for? I have a service manual, but it doesn't have a schematic for the wires. Just shows how the wire bundles run. I have a tach I'm wanting to install. Aftermarket, but it came of an airhead. Also, does BMW have a separate manual just for the wiring?

  2. #2
    Pepperfool GSAddict's Avatar
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    That connector is for the heated grip switch.

    Gn/bl - switched + supply from F7

    Or - low heat

    Bk - hi heat.
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  3. #3
    Pepperfool GSAddict's Avatar
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    Did some digging

    IF you are wired for a tach you will find a 3 pin connector with the following wire colours

    Brown - negative
    Green/Black - switched +
    Black/Grey - signal

    I got these from an R1150R schematic

    What year is your R850R?
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    Need your R11xx Hall sensor rewired? PM me.

  4. #4
    Registered User slime's Avatar
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    Thanks. It's a 1997 model. Just found that connector tye wrapped to another one. This is the first factory service manual I have ever seen that didn't have a wiring schematic included..

  5. #5
    Registered User slime's Avatar
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    Quote Originally Posted by GSAddict View Post
    That connector is for the heated grip switch.

    Gn/bl - switched + supply from F7

    Or - low heat

    Bk - hi heat.
    So, shouldn't one of those had power with the switch on? Or is that because it's not fused since it didn't come with them.

  6. #6
    Pepperfool GSAddict's Avatar
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    Quote Originally Posted by slime View Post
    So, shouldn't one of those had power with the switch on? Or is that because it's not fused since it didn't come with them.
    The switch assy plugs into that. The Gn/Bl will be hot with the ignition on provided the fuse is installed.
    Last edited by GSAddict; 05-14-2018 at 10:41 PM.
    '
    Ufda happens..........

    Need your R11xx Hall sensor rewired? PM me.

  7. #7
    Registered User slime's Avatar
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    Quote Originally Posted by GSAddict View Post
    Did some digging

    IF you are wired for a tach you will find a 3 pin connector with the following wire colours

    Brown - negative
    Green/Black - switched +
    Black/Grey - signal

    I got these from an R1150R schematic

    What year is your R850R?
    I can not find a black and grey wire in all that mess...

  8. #8
    Pepperfool GSAddict's Avatar
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    Then look for a solid black which connects to pin 35 of the motronic, that is the tach signal.
    Last edited by GSAddict; 05-20-2018 at 08:21 PM.
    '
    Ufda happens..........

    Need your R11xx Hall sensor rewired? PM me.

  9. #9
    Registered User slime's Avatar
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    Quote Originally Posted by GSAddict View Post
    Then look for a solid black which connects to pin 35 of the motronic, that is the tach signal.
    Ahhhh...I saw that one. Thanks

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