or if pads ok clean of excess dust and copper grease non friction side of brake pads.
roger
June 2009
not all cars use a warning light connected to the pads, other use a piece of bent tin mounted on the side of the pad, when this comes into contact with the disc due to reaching wear limit, the bent piece of tin vibrates/squeals like hell ,jack the car up, drop a wheel off, and inspect the pads.repeat on the other side replace the pads as a complete set.
wirecutterman
June 2009
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