More ignition issues on the dart

SpriceyStuff said
Am I understanding this correctly? I can put a 4 pin unit on my 5 pin harness and have it be fine?

Yes, not the other way. Many modules that have 5 physical pins are actually 4 pin modules electrically. The only way to tell is laborously check resistance from the "5th" to all other pins and the case and see if it's open