Can anyone tell me why my light lites up when I start the car, but now that I'm getting a grinding from my rotor, I still don't have a warning light?

Maybe they didn't put them in?

84 300SD and on Sunday all was good, now here it is the following Saturday and I have front and rear drivers side grinding when I press the pedal.

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1998 W202 C230 - The money pit of late.
1984 W126 300SD (356,800 miles) Gone to the wrenchapart
1984 W123 300D Gone to the wrenchapart
1972 W108 280SE 3.5 (sold but not forgotten)
1986 Buick Grand National 3.8l Turbo (86k miles)
1966 Glassic Model 'A' Replica http://www.glassicannex.org

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