Hi,you dont need a scanner at all to retreive the codes from a 1984 gm car ,just
connect a and b o the gm connector and count the flashes of the cel light on the dash
short flashes are the ones long flashes the tens. It starts with 12 four times, and
eeverycode found also four times,it ends wifh 12 also four times.

Hi,you dont need a scanner at all to retreive the codes from a 1984 gm car ,just
connect a and b o the gm connector and count the flashes of the cel light on the dash
short flashes are the ones long flashes the tens. It starts with 12 four times, and
eeverycode found also four times,it ends wifh 12 also four times.