|11-10-2013, 06:38 AM||#1|
Joined: Jul 2008
Location: Enid, OK
Brake Failure Light, going down the list of usual causes
So I just recently pick up a 2007 GS, my first BMW. Shortly after removing a set of PIAA lights that I wasnt crazy about their installation, I got a brake failure light. Now, I have no idea if this is related, but Im just throwing it out there.
As you can imagine, this freaked me the hell out as I had my wife on the back at the time it came on. Brakes felt strong but I had a failure light. Came on mid-ride after a stop. I should also point out that the ABS does NOT work when its on. I tested it more than once on our gravel drive when I have the failure. Otherwise, the brakes feel strong. Do they feel normal? Not sure, first Beemer and I have nothing to compare them too.
Jump ahead a month of common problem disagnoses now and I need advice. First thing I did was replace the brake light bulb in case it had a burned filament that I could not see. Didnt help, but now I have a new bulb. No harm there. Next step was tracing out the wires to the ABS sensors, front and rear. Pulled calipers off, pulled out of brackets, etc. Nothing, no wear marks or rubbing. So then I suspected a battery as it seemed a little slow cranking to me, but remember, this is my first Beemer. Finished the installation of the new Odyssey last night and same failure.
The interesting part is how it happens. First start up it flashes as its supposed to and I take off. Light goes out. First time I do a long stop coming down from 45 mph it comes on mid-stop and stays on the rest of the ride solid. Even after the battery swap last night it did it. Left the house with no light, feeling confidant, first stop coming down from a decent speed it came back on, and my heart sunk.
I know worst case scenario is an ABS pump. I've already emailed Tyler at Module Masters about price to rebuild if it comes to that.
The only thing else I can see is that the rear brake pads are looking a bit thin. Can thin pads cause this light to come on? The fronts are about 50% and the rears are probably 25% according to the ring markers on the pin. I'm going to change them anyway, front and rear, but is there any chance this is the problem? I've already installed a battery I didnt need. I guess the next step after pads is to go buy an GS911 module and find out exactly what the code is and go from there. The closest BMW dealer is 120 miles from me and I've never been known for letting anyone else work on my stuff.
Thoughts? Anything I'm missing before I drop $300 next payday on a GS911? The sad fact is it took me a long time to convince my wife to let me get rid of the Harley Road King to get the GS. The ride the light came on the first time is the one and ONLY time she's been on it. She's freaked out and doesnt want anything to do with it now. When people ask how I like it, she chimes in with "At least the Harley's brakes worked." This is killing me.
It's no mistake that the word "silent" and the word "listen" contain the same letters.
chambersc screwed with this post 11-10-2013 at 06:50 AM
|11-10-2013, 10:10 AM||#2|
Joined: Sep 2008
Location: Charlotte, NC
My 2007 RT had *exactly* the same symptoms and dealer said the ABS pump was gone. I sold it shortly afterwards minus $800, since the dealer had stated they had a $800 alternative (rebuild) to buying a new pump. Hope you have better luck. Make sure the brake pedal/switch isn't sticking.
PS--no, the pad thickness would not be a factor.
PS2--the guy who bought mine is still riding with no ABS. 8 months. Doesn't seem to be concerned.
bobbybob screwed with this post 11-10-2013 at 10:19 AM
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