so i installed a defi boost gauge..took it off my friends car working. installed on mine, using a member wright up..but the gauge does not read boost?! also not sure if this was how he wired it to run, but only iluminates when the light switch is turned on..Was spliced into the radio/hvac harness..

all the meter does is blink constantly w/the needle at rest position..

Someone help me!!!..please