I have the Greddy warning / mechanical boost gauge and i need help i dont know what to wire to what .

it comes with

a red constant 12v source
an orange 12v ignition source
and a white 12v light source


i think i wire the white to the dimmer switch but i have no clue what to wire the constant and ignition to , i was thinking of wireing the the constant to the gauge wire in the driver side fuse panel (under the dash) because the gauges are always on but i do not know what to wire the 12v ignition wire to.

anywayz thnx for any replys pics would make it easier too

 

try this:
Defi Install

I got all my constant from radio harness. I also got the ignition from the radio harness, but as my boost gauge is autometer nexus electric, it gives error if voltage drops below 10 V during crank. So I shifted my ignition line to the starter harness.

But I guess if you follow the instructions in the link, u'll be fine.

P.S. It helps a lot if you have a multimeter. I do, and its a breeze finding the connection lines!

 

+1 the link helped me while doing my gauge.