Help!!! 08 STi boost gauge for a 05 STi install
#1
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Thread Starter
Join Date: Apr 2009
Location: San Francisco/Bay Area
Posts: 17
Car Info: 2005 subaru sti
Help!!! 08 STi boost gauge for a 05 STi install
Hey I'm having trouble installing the 08 STi Spt boost gauge on a 05 Sti. Does anyone know how to install it, cause I'm getting alittle confused about this. So help me if you can. thanks
#5
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Thread Starter
Join Date: Apr 2009
Location: San Francisco/Bay Area
Posts: 17
Car Info: 2005 subaru sti
sounds easy but there are like 5 wires but im not too sure where to tap into. heres the colors of wires that came with it. also i was wondering when i install the boost lines, is the gauge suppose to sit on -20 on idle?
-purple
-red
-blk
-brown
-purple
-red
-blk
-brown
#7
Churro Aficionado
iTrader: (38)
Red- 12v power source
Black- ground
purple/brown- prolly will be wired up together to a constant 12v source
The difference between the 12v source for the red is that it will be wired to a 12v source that is turned on when the ignition is turned on.
the purple/brown will always be "on", even tho the gauge will not be lit up or anything.
As far as where to tap into, do you have or can you get a hold of a light pen? You can take out the coin tray on the lower left part of the dash and behind it are the fuses. Then take the light pen to see what fuses have power to them when the ignition is off. When the pen lights, that fuse has power and you can use that fuse for the purple/brown.
Then go back to the fuses that did not light up and turn the ignition on. Now when it lights up, you know that fuse only gets power when the ignition is turned. This is where you would want to connect your red wire.
And to "splice" all the wires in to the fuses you want, you can get an "add a circut" (AAC) at any local parts store. Would look something like this:
So you pull the fuse out of the fuse box, crimp in the wires you want going to that fuse into the add a circut and then plug the AAC into the fuse box and then put the original fuse into the AAC
Tell me if that makes sense or if i lost you lol
#10
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Join Date: Aug 2006
Location: the area
Posts: 7,380
Car Info: 04 impreza wrx R.I.P Daniel Wentz JOEBOBBUCKET
usually on the 08+ wrx and sti that gets the spt boost gauge installed at the dealer, the harness connects to the clock unit. dont know if that helps you out at all but hopefully you figure it out
#11
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Join Date: Apr 2009
Location: San Francisco/Bay Area
Posts: 17
Car Info: 2005 subaru sti
hey i got everything hooked up and powered up, but when i turn on the headlight it shuts off. and i dont know what to do not im stuck and i try to hook up the purple/brown and it does nothing.
#12
Churro Aficionado
iTrader: (38)
I think the only purpose of the brown/purple would be for the dimmer, but thats only if the gauge has a dimming feature (my gauge came wiht an orange/brown but didnt have a dimming feature).
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