Having issues with my 2014 ford focus. Does not run when the module is in, and barely when it's not.

Question

Vehicle will not run properly. I had installed the unit and it worked great! I ended up unplugging the 5 prong harness that plugs into the obd port because when placing it into the dash it got rlly tight. I plugged it back in and now my vehicle will barely start but when put into gear shuts off, and when the module is plugged in nothing works. It wont even light up. Can someone please help me.