It's a Viper 4806v remote start module and an Xpresskit XK05 bypass module. I definitely should have mentioned that before...

I installed the Viper remote start system into my old 3rd gen in 2015, and in the fall of 2023 I succumbed to the rust monster and bought a 2007 4th gen. Before I got rid of the 3rd gen, I ripped the remote start out and then installed it in the 2007 (which had a garbage remote start installed already - that's where I got the bypass module from). Like I said, everything was working for over a year, and after it got cold out this year it was working fine for a few months already.

I installed it my self, and haven't been under the dash in months. All wires are soldered, no t-taps. I've had problems with other people's t-taps in my vehicles in the past... So likely no loose connections. Plus I couldn't imagine what bad connection would cause this behaviour...

I'm starting to think it may be the bypass module... Not sure, but maybe it's not sending all the right 1s and 0s anymore? I have no idea how old it is or what its history is... Honestly that's a bit of a long shot though?...