Turns out mine was due to some crap-tastic work done by the P.O. When I replaced the stereo head unit (when I bought it it didn't have the faceplate, so I had to replace the whole thing) I soldered together my harness and plugged it in without checking out (what I thought) was stock wiring behind the gray and black plugs...turns out there was some extra wiring (forget the exact colors - a ground wire and a power wire) that were mated in with the stock wiring...now I haven't traced these back or figured out WTF they were put in there for, but when I installed my head unit those wires became energized and caused the no-start situation. So, if anyone knows anything about what those two wires are, that'd be cool...but otherwise, I cut them and now my ZJ runs like a champ! Only thing I've noticed is that the little computer display no longer powers up, but whatever...
Might go back in and disable the alarm again (had put it back together in order to keep trouble shooting), but other than that things seem fine!
Still have work to do (A/C, power locks, windows, some interior lighting, keyless entry...) but oh well - at least it's driving, inspected, registered and insured now!
Proud volunteer: "Darwin's Janitors"
2/104th CAV RSTA
1999 XJ SE 5 spd 4.0 -- Dead
2001 TJ Sahara 5 spd 4.0 -- born!
1995 ZJ 5.2L - purchased for $400 but needs some TLC before it gets inspected...