Hey whats up everyone Ive Got a problem with my Max

I recently got a dvd reciever and the Microvison tv screen and i tried to install it yesterday. I had a stock Bose System so i ordered the Pac-OEM2 to use my stock speakers with the aftermarket headunit. So I slice the OEM harness and hook up everything to the PAC-OEM2 thats connected the Headunit. So i turn on my car and the Headunit tried to Turn on and it shortly dies without powering on. and The TV screen wont even power. Can someone help?

Another problem is My Temp Gauge spikes up to the top whenever i turn on the parking lights and headlights. but spikes back down when i turn them off. Ive got reverse indiglo gauges but this has never happened before the headunit install.