M
mngoat
Active member
hooked up a dual egt/water temp., tach gauge to 2012 pro. Power to gauge seems to be working fine, egt's fine, water temp fine but tach is reading about 800 rpms higher then stock gauge tach. Seems to be two wires for tach hook up white which i have running to good chassis ground and red which is pulse pickup i'm assuming. I have this red wire running to the yellow wire that is associated with the white connector that is marked AC power in the main harness. Has a yellow and brown wire running to it. Any help is appriciated. Thanks.
