How-To: Defi Racer Electronic Boost Gauge Install - SRT Forums

EssArTee4 · 03-07-2009, 02:36 PM

So i searched all over and could not really find a good thread pointing to what wires to use when installing an electronic boost gauge. So i took it upon myself to make a write-up while doing my install.

1st things 1st, you want to pull the dash. Most people know how to do this so i did not take any pictures. Basically there are 2 screws on each side of the dash that face the doors, and 2 down in the defrost vent. Remove those 4, and the pillars "they just pop off" and then pop off the dash.

Also pull off the fuse panel cover while your at it, it just pulls off.

BTW i had the camera on the wrong mode, so the pictures suck

So the 1st the i did was remove the 2 screws that hold the fuse panel in, and pull that out. Next i used a volt meter to find a wire that was ONLY hot with the ignition ON.

This one seemed to do the trick, it is blue with a white stripe.

Hot with ignition ON only

Solder the wire that in your instructions says "12v Switched" to this wire. On my Defi it was the Orange wire

Heat-shrink it...

Next you want to find a wire that is ALWAYS HOT, even with the ignition off.
I probed around again with my volt meter, and used this peach wire.

Soldered to the Red defi wire.

And both in heat-shrink.

I chose to ground here

This is the white wire on the defi harness, it is used to dim the gauge when you turn on the head-lights. This wire needs to reach all the way up the dash to where the factory boost gauge power source is. I soldered on a wire to extend it up the dash, as shown here.

Fuse panel all back together with all the defi wires soldered.

Run the harness with your wire extension up the dash over toward the pod location.

Take the white wire you extended from the Defi harness and connect it to the Orange wire that was connected to your factory boost gauge. The Black wire you dont use, tape it up.

You can mount the Defi sensor where ever it fits, i mounted it here.

Connect the supplied vacuum line from the defi sensor to the factory spot.

Gauge off

OMG IT WORKS!!!!

Hope this helps.

srtmatty · 03-08-2009, 08:26 PM

nice i jus installed my defi this weekend except i jus plug mine into a fuse rather then solder them but good write up

EssArTee4 · 03-09-2009, 07:20 AM

Good stuff this gauge is pretty sick.

Jaysin · 03-10-2009, 05:52 PM

I love that gauge, will buy one eventually because the one that came with the car sits a pound off. Where did you guys purchase them? Price? Great writeup man, good stuff

**pavendort** · 03-10-2009, 05:58 PM

That gauge is sexy... I like that. Too bad it wont match my other gauges.

EssArTee4 · 03-11-2009, 07:00 AM

Ebay, was $190 shipped i believe. I will get better pics on it installed once it stops raining here, i still have my dash out of the car

srtmatty · 03-13-2009, 02:27 AM

Quote: Originally Posted by Jaysin

I love that gauge, will buy one eventually because the one that came with the car sits a pound off. Where did you guys purchase them? Price? Great writeup man, good stuff

jsc speed 197 shipped

**pavendort** · 03-13-2009, 04:24 AM

srtmatty, I love your avatar...

acesblack05 · 03-19-2009, 10:30 PM

read the instructions that came with the gauge you have to mount the sensor correctly or you wont get the right reading only saying because it doesn't look like you mounted yours right in the picture

EssArTee4 · 03-20-2009, 12:08 PM

Whats the right way, i mean with one screw you can only go so many ways.

CantStopSpinin · 06-04-2009, 11:42 PM

wow amazing write-up. SUBSCRIBED!

marthastricycle · 06-07-2009, 01:53 AM

Can somebody explain the 3rd to last picture? I don't know what it's showing. I understand everything until then. Just bought one, waiting for it to come. Thanks.