what wire should i splice into for my gauges

[project b6t]

i am trying to splice in my boost gauge and tach into the dimmer so i do not have bright ass gauges in my face. Theres a yellow wire, red wire, and black. Which one should i splice into? :roll:

[project b6t]

any one?

[FastoNOS]

not sure.... my gauges not hooked up to dimmer and I HATE it because they are sooo freakin bright... I will have to do that as well, as soon as I start putting the car back together... In mean time if you find out let me know or maybe someone else knows...

[Andrew]

well, black'll be ground. have you tried cutting into them a bit and using a multimeter? just splice into the one that's voltage goes down when you manipulate the dimmer switch

[Silv3rBull3t]

Yeah what he said!! I would guess like radio's red is the switched power or in this case I would bet, the differentiable dimmer wire where as the yellow would be constant power but I could be wrong.. Just test with a multimeter... -Kyle

[takeone51]

i tryed runnin my gages off the dimmer but i get weird readings with a meter, maybe its negative control but my gages work but when i move the dimmer nothin happens..