1998 acura integra LS w/ viper 791xv

it could be a bad solder joint... if the installer used solder.  must most likely its a bad t-tap or whatever other sh*tty connectors people feel like using... on the green wire is my point.  it might not be getting the 12v from the key cranking.

From what your saying about your alarm situation, I think I might have a possible solution.  You said you were driving and all of a sudden you heard clicking noises and that is when your key wouldn't start the car anymore.  I think that clicking noise is a relay energizing, one relay in particular, the starter kill relay.  Something, maybe a frayed wire could be touching a ground maybe, but something had to be energizing a relay to make some clicking noises.  From there, the series of clicks could have fried the starter kill relay and have it stuck in an open circuit (meaning the starter kill is permanently engaged, not letting the current from a regular key start flow down through the starter.)  Now your remote start should still work because the remote start tap is after the starter kill straight down to the starter.  From what you stated, this sounds like a feasible diagnosis.  So have the starter kill relay checked out, i think its fried or permanently energized.  Good luck