The first thing you need to do is determine where the brake fluid is going. If it is going low, there has to be a leak.
Check behind each of the wheels/tires to see if there is any evidence of fluid getting on them. Next, check under the vehicle to check if any steel brake lines are leaking due to rust or damage. Next, check around the brake master cylinder for leaks.
Here is a link that is titled "Brake pedal goes to the floor." It explains how to locate leaks.
Let me know what you find or if you have questions. Once we determine where the leak is and prevent the master cylinder from getting low on fluid, chances are the lights will turn off and stay off.
Let me know.
Thursday, December 30th, 2021 AT 6:17 PM