Abs light stays out but abs applies at 10mph to stop even in dry conditions

The light being on means the system has detected a problem in one or more sensors. The vibration is the ABS modulating the brakes to prevent skidding because it has detected a wheel that is locked up. That wheel is most likely the one sensor that is giving you the error.

It sounds like the front brake pads are worn to the point where the caliper piston is over extending, this can cause a lock up condition and damage to brake rotors. If you have no brake repair knowledge, take it to Midas ASAP. Safety is critical so don't delay Brake Pad service.

only when they is fault in any abs sensor abs light will light on that mean no problem

Abs Light:
If its glowing momentarily while driving in slick conditions then its normal operation..
But if it stays glowing even under dry pavement then there is a problem with your anti lock brake and traction control system..
It happens commonly of wheel speed sensor which malfunctions..
Try to access the data in the anti lock brake module to find out which one malfunctions..

it should leave light skid marks and the brakes can lock on and off rapidly, but it should not lock up and stay locked up

It Sounds Like Your ABS Channels, Its A Separate Hydraulic Circuit That Feeds Out To One Or More Wheel Cylinders Or Caliper Pistons.Anti-Lock Brake Systems Can Have From One To Four Channels.

This is usually caused by one of the front wheel speed sensors dropping signal under 10MPH. the first thing to try is to remove both front wheel speed sensors (Behind brake rotors) and clean the area where te sensor goes into the hole. Then lightly grease the sensor O ring and reinstall it.

The abs is a add on for the brakes that when the tires come into a skid or slid they wont lock up..Your brakes will still work great with the abs disabled but your brakes will lock up if you push on the brakes hard enough to stop.Mainly abs works in slippery conditions not letting the tires lock up and keep the car rolling instead of making it slide..But no effect of the brakes will happen..Just make sure your fluid is full and there are no leaks and if you want to get them check you can stop by your local Auto Zone and they will scan your car for free and tell you what sensor is bad..I hope this was helpful to you...Have a great night

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

It sounds like one of your wheel sensors isn't working, and the ABS is thinking that one wheel is locked up, so it's activating ABS.

Or you could just pull the fuse for the abs and not have abs but you won't wreck from pulsating pedal.