In many cars, the modem that phones home with your data may be a separate unit. Depending on your make and model, you can sometimes buy cable adapters that will connect power to everything except that subsystem. The term to search for is a “DCM bypass plug”.
In many cars, the modem that phones home with your data may be a separate unit. Depending on your make and model, you can sometimes buy cable adapters that will connect power to everything except that subsystem. The term to search for is a “DCM bypass plug”.