Hello,
This is my first post here. Tried searching but couldn't find the answer. I looked at various websites showing how to jump the A, B pin connectors to get a code. Mine won't pull any codes when I do this. The engine control module was recently replaced. My check engine light stays on while driving and the car occasionally dies when stopped at a light or stop sign.

I'm also having trouble with my A/C compressor fuse blowing, but that may be a separate issue. I'm going to replace the compressor relay and see if that helps that problem.

Thanks in advance.

-Mack

 

on the 1994 Caprice ODE1 will not allow the codes to be seen using the A to B
option you will need a meter to read the codes as long as the engine light is on.

Hope this helps, as I sat for 3 trying to figure that out also...
until I found the reason on many sites online asking same questions.