Have a '95 pontiac Transport. Cant find a code reader tool to plug in to this thing. It has a socket under the steering column area but it looks nothing like the OBD1 where I could just access the codes with a paper clip or something. It definitely is not the OBD2 either. The socket only has 3 wires. What code reader tool is compatable? And on this model can I still acess the codes with a paper clip? And on what two terminals?