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Depending on what car you have. It's as though you have an abs ring/sensor fault, the noise you are hearing is the abs pump working this is because the gap between the abs sensor and the abs ring is to close, which make's the abs control module think that the wheel has locked up. causing it to open the valves in the abs hydro unit to try take away the pressure from the side with the fault.
Sounds like you have a brake problem or a bad wheel bearing. If it makes a noise should get it checked out. My ABS light came on and I had to replace my rear wheel bearing as it made a noise also . Your ABS light is lit by a sensor in the wheels.telling you something is wrong.
This one is considered a "soft fault" and will not show up until 15 mph when it
turns on the light. Your switch could be OK and something else in Circuit #420
(that's the factory number for the circuit). What the light really means is the
BPMV is not seeing the brake switch signal. After a little
more reading your condition is probably caused by an open brake switch circuit
(bad switch). Happy to help. Drove me nuts and I was sweating having to buy a
new ABS unit. Switch was like $15.00 and adjusts itself.
well it looks like theres a problem in your break system somewhere could be the calipers mabey one is sticking or it could be dragging and its a warning i always thought that if the abs comes on then that means your vehicle is performing a duty in order to keep the breaks from locking up due to something malfunctioning.
Not a booster problem. what bad noises? abs problmes wont make noises, unless its the pump operating. ck the mushy pedal, that will maybe fix all problems. I dont think its related to the 2/4wd lights?
Your ABS systems use a combination of electronic and hydraulic systems to modulate the brakes individually to prevent them from locking up. ANTILOCK systems consist of wheel speed sensors, a hydraulic control unit (HCU), and an electronic control unit (ECU). Because of how complex the system is your computer does a self-test. If the check is successful, the ANTILOCK and BRAKE lights will go out within a few seconds. If one of the component of the ABS system fails to pass one or both lights will remain lit. One or both warning lights may also come on while driving, also indicating a problem. If just the ANTILOCK warning light comes on, some ABS component has failed, but the car still has hydraulic brakes. The grinding noise could the the ABS pump or your brake pads could to worn to the metal backing and grinding against the brake rotors. I recommend a inspection soon for your safety.