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Old 11-03-2005, 05:39 PM   #1
Scooby Newbie
Member#: 94053
Join Date: Aug 2005
Chapter/Region: South East
Location: marion , arkansas
2004 wrx

Default dash pod wiring

i have a 04 wrx, i just bought defi d guage oil press, egt, and a/f. my question is can i take the harness that plugs into the back of the clock and wire my guages in to that plug. ground,12v,illumination,and ignition. or what are some of the other ways you guys have done this.
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Old 11-03-2005, 07:14 PM   #2
Scooby Specialist
Member#: 37617
Join Date: May 2003


Yes you can.
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Old 11-08-2005, 11:15 PM   #3
Dutch Scooby lover
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Member#: 32452
Join Date: Feb 2003
Location: The Netherlands
1998 Impreza Turbo


For a A/F Ratio gauge (and for the other 2 as well, when you already have the wires there) isnt it best to run the 12v and ground wires directly to the battery, in order to get a good clean ground.

I had my gauges (oil temp, oil pressure and boost) connected to the wiring harness/adapter between the stock wiring and the radio
and always had a problem with the gauges dimming a bit when playing songs with some deep bass in it.

I could live with that.
I then purchased a Omori A/F gauge, which didnt seem to work as it was supposed to (readings different with radio on/off , heater on/off and such)
Returned the unit, got sent another which had exectly the same problems.

Got pissed off, and after some research decided to run dedicated wiring (ground, 12v) to the radio, 3 gauge pod in the dash housing and the pillar pod mounted AFR gauge, only using illumination/switched wire from the adapter behind the radio.


1 No more dimming of radio/gauges
2 AF ratio that works like its supposed to.

The original A/F sensor wire at the ECU and in the exhaustsensor only sends out a voltage between 0,5 and 1 volts, with stoich. mixture somewhere between 0,87 and 0,9 volts of output, so having a bad earth will render the (already not very usefull) output of the original narrowband sensor useless.

So i would encourage u to run some wiring inside the cab from the battery (fused at the batt, of course) to power your gauges.

Last edited by Dutch Scooby lover; 11-08-2005 at 11:20 PM.
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