Date registered: Aug 2002
Location: Kent, England
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RE: What does it mean when the "BRAKE" light flashes while you are driving ??????
Pads with a wear indicator have a wire buried in the pad material. When the material wears down the wire is exposed and when it touches the disc it completes the warning lamp circuit. I guess is the disc was slightly ridged or warped, the wire might touch in some parts of the disc and not in others.
So, sitting at lights with the brakes on you get no indicator lamp, but when you're moving the disc is rotating and the lamp lights when you hit the brake pedal. I guess.
What it means is that the pads are worn - or possibly there's a gremlin in the warning light circuit.
The pull to one side under braking could also be a symptom of worn pads, or maybe a sticking caliper.