Parking brake light

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Blaise
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Joined: Wed Apr 21, 2010 4:01 pm

Parking brake light

Post by Blaise »

My parking brake indicator light seems to be flickering on and off from time to time, while I am driving.

I know that the brake is not on and I know that the issue is not in the hand lever switch.

Is there a common culprit for this? Is that little relay under the rear bench seat related to this? I thought I would ask before chasing the full length of the wire looking for a short.

Thanks,

Blaise
1977 BMW 530i
1973 R75/5 BMW (motorcycle)
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alotawatts
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Post by alotawatts »

Double check the MickeyMouse designed wire with contact clip behind the brake lever pivot point.
Three E12's and one R27
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Blaise
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Post by Blaise »

alotawatts wrote:Double check the MickeyMouse designed wire with contact clip behind the brake lever pivot point.
Nope, that thing looks perfect. I tried to drive around with that wire disconnected and the issue is still present.
1977 BMW 530i
1973 R75/5 BMW (motorcycle)
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bizz
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Location: Australia

Post by bizz »

I had a brake fluid leak at the master & when my fluid dropped below about 3/4 in the reservoir, the light would flicker. Topping up the fluid fixed the issue.
1976 528
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Blaise
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Post by Blaise »

bizz wrote:I had a brake fluid leak at the master & when my fluid dropped below about 3/4 in the reservoir, the light would flicker. Topping up the fluid fixed the issue.
I forgot about that. Sure enough, it was a bit low. Hopefully that was it. Thanks a million for answering my silly question.

Edit, after driving it a bit, I think that was the issue. I can't believe that it had not occurred to me. Thank you again
1977 BMW 530i
1973 R75/5 BMW (motorcycle)
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Blaise
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Joined: Wed Apr 21, 2010 4:01 pm

Post by Blaise »

Well, the fluid level continued to get low and the light came on again (as designed). Eventually, I discovered that the flex line attachment to the clutch master was not tight enough. My bad.
1977 BMW 530i
1973 R75/5 BMW (motorcycle)
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bizz
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Joined: Thu Aug 04, 2011 7:56 am
Location: Australia

Post by bizz »

Good to know the cause, those leaks can be tricky to track!

I had what seemed a catastrophic leak at my master - two new grommets & elbows + new rubber lines fixed the issue. Thankfully MUCH cheaper than a new master. :)
1976 528
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