There should be a power wire supplied with the kit that hooks to the 2 terminal connector...then you run those wires to the battery...or wherever you plan to get power from
I am trying to hook up the tach wire on my vapor gauge....I attached the yellow wire under my seat to the red wire to the gauge and then grounded the black wire to the chassis.
When i fire the bike up the gauge seems to work fine at idle but when I rev the bike the gauge goes backwards.
I...