Alron67

So here is my first help me thread. Ive had my xj for about 3 weeks now and all of a sudden my tail lights only work when they want. It does have the dreaded renix abs brake system. I can here a click in the rear like a switch. Sometimes the click is at the top of the pedal and other times i almost have to be smashing the pedal to the floor. Can anyone help? Its still dark when i leave to work so i gotta fix it asap. Thanks in advance fir any and all help