The error B1259 Code has a meaning and it is necessary to know the meaning if you want to fix the problem. It is found different models and manufacturer use B1259 Code for the car but meaning of the code may not be similar. That is why, it is necessary to know the model and manufacturer of the car along with manual of the car. The problem B1259 occurs for occurrence of voltage at the panel attach will not create the panel work if there is a bad ground connection. Do not practice a self-powered test light since it cannot quantity conflict.