How to test ignition components.

[RJRENTON]

Oh yes, I would have to agree with a ballast resistor goes down or stops resisting the lower current from the way we figured it out at a Dodge dealership some 35 years ago it underpowers the ECU causing it the ECU itself to work harder and try to draw more current which would cause transistors and diodes to fail and then the ECU would overheat from overworking, and everyone that I ever personally saw stop working, one (without removing a bolt or a screw,)see the gooey looking sap material that seals the electronics running down the firewall/ bulkhead, you can tell right then the ECU was toast.

That is NOT even close to the way the system fails....where did you get your suppositione from....not even remotely close to reality....
BOB RENTON