BMW 1150GS 2003 IABS INTEGRATED SERVO

smiggss

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Jan 23, 2014
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After bleeding my brakes on my gs1150 iabs 2003, all ok brakes bled but lost servo completely
on front and rear circuit, and brake light now constantly on.
Brake failure warning on dash flashing 4 to a second
residual brakes only
Bought a gs 9-11 and although it didn't point directly to the problem it did help.
It told me that the rear brake was applied.
I looked at the usual stuff, rear brake pedal switch stuck or broke.
All pressures ok in system
fluid level all ok
Then it occurred to me that the rear brake is controlled by the abs unit
which is connected by the large multi pin plug on top of abs unit, I examined this closely
and found that when I put the large plug back on the plug actually pushed one of the pins in the socket slightly down in to the socket, so the plug failed to make a connection with the socket.
Remedy was to get my long nose pliers and just pull the pin back up slightly, connected the plug
and everything solved in a instant.
I wonder how many others have had the same problem and not found it, forcing them to remove the servo and abs, I have been reading lots of forums and lots have people have had this problem, but none have mentioned this solution.
Anyway I am now one happy bunny thank you gs 911
 
Be quite annoying to replace a servo unit just for a dodgy contact - bet its happened.

Thanks for sharing
 
SOCKET REMOVED TO PROVIDE BETTER ACCESS TO THE BLEED NIPPLES JUST BEHIND PLUG.
FORGOT TO MENTION IT ALL STARTED BECAUSE I REPLACED FRONT HOSES WITH
BRAIDED.
THEY LOOK GREAT NOW THOUGH
 


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