Quote:
Originally Posted by engatwork
An indicator light will come on when it is time to replace them.
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What happens if the warning light does not work? Too late when you hear scraping sound against the rotor. If the OP makes an effort to inspect it, presumably removing the wheel, and concern about the thickness then just replace them. Personally, I do not wait for the light to come on. I change them after 20K to 25K. Pads are cheap if you do it yourself.
Or you can test the warning circuit by shorting the sensor to chassis. The light should come on. I do it when I change the pads.