obd2 not linking with vehicle

Hello all, Lifetime Ranger rider/driver here, first time forum user. I have a 1997 Mazda B2300 whose only feature is a tach, and over the past few weeks I have been diagnosing a crank w/o start + no OBD communication issue. After browsing and trying the common solutions of changing out the...

ive replaced the transmission, clutch safety switch and battery checked all fuses and relays, has all lights inside and out, power to both 12v power points and power to the obd2 port but when i scan it fail to link with the vehicle and the pats light flashes which is normal but continues to...