Brake bomb

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monoi
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Brake bomb

Post by monoi »

Hi there,

I have had the brake light flashing for a while (the one on the left of the warning lights in the right corner of the instrument cluster) so after reading on the forum, I decided to change the brake bomb.

Surprisingly easy, no need for outlandish tools apart from a massive plumber adjustable wrench to unscrew the bomb. I prised the latter in my vice and turned the regulator instead of the reverse after breaking a filter removal tool. Very easy in the end.

However, the light is still flashing although a lot less than before and only when driving along and when the road is less than smooth. It used to flash all the time, especially at start up but not anymore. So there is progress but I'm wondering what else I need to change or repair to stop it flashing continuously?

Any advice appreciated.

Pascal
1989 635Csi
635 Csi highline 3/89
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tschultz
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Re: Brake bomb

Post by tschultz »

Are you sure you problem isn't simply a wear sensor for the brake pad? This will light up on the dash just like the brake fluid warning.
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monoi
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Re: Brake bomb

Post by monoi »

Good point, I shall check those.
635 Csi highline 3/89
monoi
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Re: Brake bomb

Post by monoi »

Hats off to you, it seems that unplugging the pad sensor and replugging it did the trick. No red flashing light, 1st time in a long time.
635 Csi highline 3/89
wattsmonkey
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Re: Brake bomb

Post by wattsmonkey »

It's a different light for the pad warning sensor versus the bomb, just for info!
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ron
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Re: Brake bomb

Post by ron »

monoi wrote: Sat Jan 13, 2018 12:37 pm I have had the brake light flashing for a while (the one on the left of the warning lights in the right corner of the instrument cluster) so after reading on the forum, I decided to change the brake bomb
As Rob says below:-
wattsmonkey wrote: Sat Jan 13, 2018 5:58 pm It's a different light for the pad warning sensor versus the bomb, just for info!

It tells you what each warning light is in the owners handbook. Have you not got one?
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JCS
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Re: Brake bomb

Post by JCS »

monoi,

Good Ron,
I always try to tell members to get an owners handbook also.

If you are low on brake fluid (lid switch), that could also be it.
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monoi
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Re: Brake bomb

Post by monoi »

I have the owners manual, it's just that it is temporarily misplaced...

So it wasn't the pad sensor (truth be told, it was in perfect condition) but I drove the car 50 miles today on b roads with no red flashing light. I assume it took the system a while to get rid of trapped air maybe?

All is well now on that front, just that speed sensor annoyance.
635 Csi highline 3/89
rhanley 635csi89
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Re: Brake bomb

Post by rhanley 635csi89 »

There's a copy of the 88-89 owners manual in the Tech section, search "owners manual" if this link below doesn't open up. Roger

https://drive.google.com/file/d/0B4jl9x ... BrSTQ/view
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Re: Brake bomb

Post by ron »

rhanley 635csi89 wrote: Mon Jan 15, 2018 1:07 pm There's a copy of the 88-89 owners manual in the Tech section, search "owners manual" if this link below doesn't open up. Roger

https://drive.google.com/file/d/0B4jl9x ... BrSTQ/view
This is for US & Canada. There are some appreciable differences between that and the UK version.
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