HOW TO: Install an MSD Blaster Coil on an 84 Fiero (Page 2/2) RWDPLZ DEC 09, 09:53 AM quote Originally posted by edfiero: My guess..... correct me if I am wrong is that A/B is the GRAY connector with A being white wire and B being the big Pink wire. C/D would be the black connector, with C being white and D being Pink. Then as for the wiring connections: The Original Fiero harness...big pink wire, connects to B and the black (tach filter?) goes to A. Now here is where I am a little sketchy, but it seems that Black wire from the original harness will go D, and the original brown wire will connect with C. Yes, correct. Here's a picture of the coil in a Fiero V6, you can see the pink and white wires in the above 85+ wiring diagram and the orientation of the wires in the connectors: