Obd

I have a Problem with the connector or the Diagnosic system/ When i plug the connector in the screen on the the OBDII scanner doesnt do anything> but when I plug it into another car it works< i had this scanner for about 3 yrs and i know how to work it so the scanner isnt broke. i wanna know is the a fuse that goes to the plug or is the a common problem in 02 GP GT and is there anything i can do to fix it

The odb-ii ALDL port gets power through the cigarette lighter fuse so check that first.

that was the problem< thanks