Quick brake question

[milarsky]

Hello All,

Lately, and now and again, I have been getting a "Brake" light flicker on the dashboard. It usually occurs after some thrashing of the M5 on the back roads of NW Connecticut. Then it disappears for a few days. Brakes are in good shape, rotors, pads, etc. Is this a warning of a failing brake pressure regulator, master cylinder, hydro accumulator? Brakes feel tight and true. Any thoughts would be greatly appreciated.

thanks,
jeff

[Preyupy]

With the engine running at idle with the car stopped push the brake pedal 2-3 times quickly, hard. If the light flashes you might have an accumulator that is going bad.

[jayjaya29]

Your thrashing may be setting the brake fluid level indicator off. Maybe add some brake fluid to the reservoir so it doesn't trip the light.

[milarsky]

Thanks for these replies. I will start with these.

best,
jm

[Randomg]

I had that show up when I took turns hard years ago. I remember it being the cap was missing that rubber/foam seal on the reservoir.

[Philo]

I had this happen years back and it turned out being a brake pad sensor wire shorting out. My wires as they exited the fender well wall were all cracked so I just bypassed the wires and now run without pad sensors. Might not be your style though.

[milarsky]

Thanks guys. Philo, that brake light you are referring to is the "brake lining" light correct? Mine was just "brake". I think it signals different things? Thoughts?

best,
JM

[Philo]

Sorry, but it's been so long ago I can't recall. But I found this diagram showing the warning indicators. Hope this helps.

[Randomg]

Brake lining is a different light.

Brake is either a problem with pressure or reservoir level.