So what do you measure across d and e when you push the on switch? If you drop way below 400, then you have a safety that is causing the issue of it not firing. What you can do is jump each safety one at a time to see which one is the cause of the issue. I usually start with jumping the on/off switch. I find many of these bad. If no fire, then put it back the way it was and jump the roll out switch, and so on right down the line.
Order of items I find wrong, on/off switch, rollout switch, one or both high limit switches.