how did you guys hook the light up in your boost gauge? did you just slide the (+) wire into the fuse block with the lights fuse, and ground the (—)wire

 

Power wire goes to 12 v switched, Light wire goes to headlight fuse, ground to ground.

goto autozone and they have these fusebox inserts that have a wire coming off of it and you attach the guage light wire to it. They're pretty cool.

 

i am not sure ifr fi just misunderstood you, but when i followed your directions it made the light turn off when i turned on my lights, and turn on when my lights where off so i,

hooked the 12v source to the fuse that controls my dash lights, and grounded the other side to the frame.

I used the "ad a line" fuse box conector you suggested and it worked out great.

to find the fuse for my dash lights i just started pulling one by one untill the lights went out.

so now it works and i can read my gauge at night.

 

yea, you gotta get the correct fuse

 

it had nothign to do withthe fuse it was the wiring. I used the same fuse. you only want power when you haev your dash on. not a constant that breaks fround when the fuse is on. that gives the reverse situation i described. you need the ground constatn and the power to be the switch.