Well I search and can't find any info. I just got an aftermarket boost gauge. Can some one help me on how to hook it up. If there is a write up or any thing please let me know. I have a 1988 turbo coupe auto thanks for the help.
The air line has to be connected to engine vacuum/boost which can be tee'd off the vacuum distribution tree at the firewall
Then the back light has to be wired in to the dimmer switch circuit