1992 Volvo 940 with abs brake's rear brake's do not do not work do you know why?

If the rear brakes on your 1992 Volvo 940 with ABS are not working, it could be due to several issues. Common causes include a malfunctioning ABS module, air in the brake lines, or worn brake pads and rotors. Additionally, check for issues with the brake fluid level or leaks in the brake system. It's advisable to have a qualified mechanic inspect the brake system for proper diagnosis and repair.