Does the sct tuner have to be connected to a laptop to use inside truck.
If you bought it used, chances are you won't be able to use it. They are proprietary. There is a security USB dongle that must be plugged in to the laptop when loading a tune into the hand held. If the hand held has been programmed already, it won't fire up on someone elses truck. That way SCT doesn't get ripped off by selling one PRP to a guy and then he goes and tunes 1,000 R/T's with it.do ineed to have it plugged into a laptop to load into truck because it doesn't turn on when plugged into truck alone.