DirtyBomb

I know theres numerous posts about this but I'm just terrible at diagnosis. 96 xj , currently have ignition weird to a toggle and push start. went to dive it last night, turns over, starts and dies immediately. Try to crank again and get a single click. If I try to crank after that I get nothing. But if I cut the ignition and switch back on, I get a single click again. Starter is only a few weeks old and the battery was replaced 2 days ago. Ive driven this maybe twice in the last two weeks.

Any ideas? Ill check my ground connections again, but all my accessories work fine, just won't turn over