Air/fuel gauge install question

[Ljspeed]

Ok ive pretty much finished my Autometer boost and air/fuel gauge install. All that is left is the red wire for the air/fuel gauge. Im trying to find a wire that is not constant since ive tried two but once i turn the car off the gauge stays on. If anyone knows of a wire I can tap into, that would be greatly appreciated. Thanks

 

[jersey_emt]

I tapped into the empty rear wiper fuse slot for a bunch of accessories...I think it's a 20amp socket..it was a lot easier than splicing into a wire..plus it makes its own circuit which IMO is always better.