Brake rotors are warped.
(1) Warped brake rotor (2) an out of round brake drum (3) a warped or damaged brake shoe.
When you fully depress a brake pedal of a vehicle with ABS you will fell a Pulse A pinch a pain a pull
pulse
pulse
Pulse
This sort of thing is usually caused by brake rotor thickness variation or out-of plane condition. Other possible causes are ovaled brake drums, bent hubs, bent (solid) axles, improperly seated brake rotor or drum.
The brake light switch is under the dash hooked to the brake pedal at about midway up. It is a little switch that is like a push button that goes "CLICK" when activated, sending a pulse to the lights telling them when to turn on and off.
A pulsing brake pedal indicates a warped disk rotor and that means the rotor needs to be replaced. In that case, they should both be done at the same time.
It is most likely caused by a rotor that is warped. When you step on the brake pedal, the brake pads pulse against the uneven surface, causing a "thumping" you can feel. Other possibilities could include a bad wheel bearing or a tire that has tread that is separating.
take it to the dealer tell them you just want a diagnostic performred. see what they say posibly you can do the repaires yourself. but have this checked out.
faulty distributer, bad earth terminal on batterie also body controle unit ontop of park brake can stop injector pulse, early to late 90 models
You have a warped brake rotor. They can be resurfaced but the cost to replace it with a new one or resurfacing is about the same, go for the new one.