I have a 98 Durango. The ABS and Brake light stay on and the brake pedal goes the whole way to the floor. Any ideas what the issue is??

 

check for a leaks, you have air entering the brake system somwhere.

 

Get the code checked out. As for what it could be theres a list full
Master cylinder, lines, air in the lines, low fluid, rear brakes not adjusting


*** Side note --- Whenever the ABS stays lit after the initial 2 second check on the dash, the ABS system is shutdown until the problem is fixed.