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    Problem solved - with some coaching from Steptoe...

    Problem solved - with some coaching from Steptoe in the UK, I did a bypass of the ABS modulator for the rear wheel only. As the front brake works fine with the ABS I left it alone and pinched off the...
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    Woo Hoo!

    Did not work on mine - the adapter body has no filter on the end that is inside the modulator. I pulled 1 of the 2 - could not get the corner one all the way out with the wrenches I have - and found...
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    Fail!

    Took a compressed air line and blew out all the rear brake lines - modulator to caliper and meter/control circuits to rear reservoir. Refilled everything and bled thoroughly - same problem remains....
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    Thanks, Dave - excellent suggestion. The used...

    Thanks, Dave - excellent suggestion. The used units seem to be very scarce in the US at least. I had a response from a European/Russian parts source but nothing came of it. You gotta love the...
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    Thanks, Bob - exactly what I was hoping to hear....

    Thanks, Bob - exactly what I was hoping to hear. The salvage yard sending me the replacement unit assures me 'it is a working unit' but I suspect that is their standard reply to customers. They offer...
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    ABS modulator about to be replaced with used one

    ABS modulator replacement 2004 BMW R1150GS
    To finalize this thread I have been through all the possible problems that have plagued this bike for 3 months now - 20,000 miles and the >rear brake...
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    Fault codes

    Jurgen... and others. Sorry for the dead silence here - issue is still unresolved. I borrowed a GS911 tester and it tells me "Faultcode fouind 17438: Pressure in rear wheel circuit too high" and...
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    ...waiting for a reply from beemershop on the...

    ...waiting for a reply from beemershop on the analysis they may have for this.

    Assuming you are correct, and the price tag for a new modulator beyond my modest retirement budget, what is your...
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    Update - rechecked the rear brake microswitch...

    Update - rechecked the rear brake microswitch connector. Jumping the pins on the side that comes from the ABS relay did not change the flashing lights. Leaving the connector body open and turning on...
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    Al, on mine the microswitch is NC and I will try...

    Al, on mine the microswitch is NC and I will try that - jumping the pins at the connector. Yes, with an Ohm meter the switch tested fine at the connector. I had to use straight pins to get a reading...
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    I did that already - in the process of checking...

    I did that already - in the process of checking out the microswitch, but I checked it again- internal inspection looks fine and the connector M/F bodies fit together very snugly with no play. Your...
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    From the Wisdom section of ADVrider: 4.13 Other...

    From the Wisdom section of ADVrider:
    4.13 Other ABS problems

    1200GS
    The Honorable rideLD has, based on years of following GSpot, compiled the following list; his experience is that almost all...
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    BMW dealer is a desperate last measure here -...

    BMW dealer is a desperate last measure here - long ways away and not responsive by reputation.

    I cleared the fault codes and retested the bike and got the same readout instantly upon starting the...
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    GS911 readout - fault codes

    I borrowed a GS911 diagnostic device and got the following readout today:

    Faultcodes found
    17914 Faulty power supply to warning lamp relay
    the fault is not present now
    17438 Pressure in rear...
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    Jurgen - I am following you. You are talking...

    Jurgen - I am following you. You are talking about the ABS relay in the fuse box and the control relay that sits beside the ABS modulator, correct?

    It could well be that now the rear brake switch...
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    Don't think it is either of these - front brake...

    Don't think it is either of these - front brake circuit works fine, Brett. Brake light comes on when either the lever or the brake pedal is depressed.

    It baffles me now why the servo does not...
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    Jurgen - gaining information here, thanks to your...

    Jurgen - gaining information here, thanks to your suggestions. I found this AM that the rear brake pedal alone gives poor braking and at 20MPH I had to stomp it hard to get it to lock up the wheel....
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    I don't think either one is in residual mode,...

    I don't think either one is in residual mode, Jurgen. At a 60 MPH full lever stop the bike is almost falling over dead in 30'. It is a bit nose-down at that point so I have to say it is possible the...
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    Continuing dillemma ...

    Jurgen - apologies to you and any others that follow both this and ADV rider. You responded to my query over there as well as this one here. Anyhow - here is the latest report to be sure we are all...
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    ABSi problem on R1150GS 2004 model

    A while ago I found the ABS lamp flashing rapidly with the warning lamp - odd times during the ride this would start. I could shut off the bike and it would go away on restart. No problems with any...
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