I have a cat 277c that parking brake is flashing as well as indicator light. When you hit the p brake switch it will allow only aux to operate. Needing some ideas on what it maybe. Ecm?
See if you have any codes ...Hit and hold far right button and up button on digital readout screen til blank screen and open book symbol then hit up button to see each code till it repeats
Do you know what a code E568 indicates please?