OBD 1.5 PCM pin out diagram? (Page 1/1) mad dad matt FEB 06, 07:54 PM Donner car is a 1995 old 88 with 3800NA. PCM is OBD 1.5 #16215714 with 3 plugs, red .white and blue. Each of the 3 plugs are 32 pin. 2/3 of the wires I can trace back and ID so any 93-95 gm would be appreciated for comparison pins. The other 1/3 runs way up into the dash. Most of the dash wires I won't need. I know I am missing vats wires. Unless the security is not run through the PCM on this.