Hello , I am in desperate need of getting my G37 fixed smh I was driving and all of a sudden I got a CEL and then my Speedometer (RPM) (TemperatureGauge) (SpeedGauge) all went out and my gear indicator disappeared and the car was in limp mode only up to 3rd gear and the A/C started blowing full speed by itself and the radiator fans blowing full speed and the car didn’t want to turn off at all had to disconnect battery. The passenger side has never had water damage as I always inspect and the BCM I opened up and has no sign of water damage nor does the box itself have. My mechanic who did my transmission swap told me that it’s not my BCM and something loose or a grounding point can anybody send any help or info possible please 🙏 Someone also recommended it was my A/C amplifier but before I waste money I wanna know