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Hey im new to this forum and im trying to install a boost guage and if you could tell me where to run the vacume/wirering to T into that would be great thanks

03 gti 1.8t
 

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I'm new too......where are you mounting it? Steering column? I was toy'n with replacing the stereo with a single din, and using the bottom extra space to make a 2 holder gague display......Grab Boost/EGT

This is what I used to install in my LGT's it might help you get the concepts down, DON"T follow it though, wires will most likey be diff colors and everything in diff locations.

http://www.sevenphotos.com/avo_guides/view/Classic.view/cover.php?name=boost_gauge_guide

I'll do up pics/instructions when I do one.....but that's gonna be WAY too late for ya....sorry man
 

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I mounted mine on the column, and ran the wires to the fuse box on the drivers side interior dash. use a multi meter to find a blank fuse holder with constant 12 volt (with the key out of the ignition), then hook into that useing a fuse with a wire coming out of it(buy them at any autoparts store) do the same thing for the acc 12 volt line with another fuse blank.

Note you will need 2 fuse with wire extentions. 1 large, and 1 small.

this is what the head technician at my dealership told me to do to keep from voiding the electrical warranty, since you are not hooking into any existing systems.
 
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