Hey guys, I had a defi blue racer gauge in my car but last night I changed out to a digital AEM gauge. I tried my same power/ground spots that i had the defi in for months with no problems. I ran the red wire to the back of the head unit (where i had the defi) and the ground is in the center console in the same spot i had the defi. The gauge turns on and functions OK but when i take the key out of the ignition, I am getting a constant 0 reading. The gauge does not turn off. I have searched AEM's website forums and also called them which was not very helpful. This is driving me insane because I put both power and ground in the SAME spots i had the defi in. Can anyone help ?