I have a 06 Dakota 4WD with 2 wheel ABS, when driving down the highway at speed the brake and ABS lights came on, and the speedometer froze. Even when I stopped and cycled the ignition the lights stayed on and the speedometer stayed at 60 MPH. A few miles later the lights went off and the speedometer worked properly. I am puzzled, should I just carry on or be concerned of future problems/hazards. Thanks in advance for any help on this issue.