I just recently bought a '93 N/A non-runner. It currently has no spark and that's why I'm working to diagnose.
I have fully disassembled the distributor and understand I have 4 electrical devices in it: 1) radio noise suppressor (little/mounted to outside), 2) ignition control module (mounted to the outside), 3) pick up coil (inside cap and connected to ignitor), and 4) ignitor (inside cap and connected to pick up coil).
Based on posts I have read on here I ran through the diagnostic tests. I have 12V at my ignition coil and the coils ohms are in spec. When cranking, I do not have the expected 6V on the negative side of the coil. I have .1V to .25V there instead. I moved on to the distributor. I immediately suspect the ignitor because the tachometer does not bounce when I hit the starter. I put in a different ignitor and no change. It's totally possible I have two bad ignitors. Is there any way to test an ignitor off of the car with my multimeter?
I tested the pick up coil and I have continuity that's in spec for it. For good measure, I tried a spare one as well. I tried a spare ignition control module too--that didn't help either.
At this point, I have two distributors worth of electronic components and no joy. I cleaned every ground in the engine bay that I could find (reference manuals to sort out missing ones).
Next steps? I am going to try and hunt each wire running of the distributor and trace it back to its source. I have the wiring diagram but am having some trouble reading it. Does anyone have a simple text list of the wires leading off the distributor by color and where they go? That would be super helpful!
I will try cleaning connectors and fuse panels next--I did not get all of those when I worked on all the grounds.
At what point do I decide the problem isn't in the distributor at all? I don't see how it could be anywhere else but I'm open to all ideas on this hunt for now! Thanks for your thoughts.