Welcome to the North American Subaru Impreza Owners Club Thursday May 23, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Electrical & Lighting

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-24-2003, 04:01 PM   #51
SLKWrx
Scooby Specialist
 
Member#: 8247
Join Date: Jul 2001
Chapter/Region: Tri-State
Location: Woolwich, NJ
Vehicle:
2016 Outback
2005 Lotus Elise

Default

Quick question. Pin 7 of the 741.. is it tied to the output as well as ground or straight to ground. I'm assuming ground but its always good to be sure. Pin 7.. thats Vcc right? I'm thinking it is.. but I'm not sure.

-- Steve
* Registered users of the site do not see these ads.
SLKWrx is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-24-2003, 06:02 PM   #52
vrg3
Scooby Specialist
 
Member#: 25796
Join Date: Oct 2002
Location: Cleveland, OH
Vehicle:
2012 Impreza

Default

Pin 7 is Vcc, yes. Do not hook it up to ground! It should be connected directly to the Illum(+) input. This way the circuit will be powered when the headlights are on, and will not be powered when the headlights are off.

In the schematic, where wires cross, they are only actually connected if they have a dot at the joint.
vrg3 is offline   Reply With Quote
Old 04-29-2003, 08:29 PM   #53
jjunior887
Scooby Specialist
 
Member#: 16738
Join Date: Mar 2002
Chapter/Region: MAIC
Location: Charles Town, WV
Vehicle:
2015 WRX Limited
CWP

Default

Just to let everyone know the setup that vrg3 designed works perfect for my three Omori gauges, they dim(with the factory dimmer) and match very well with my dash lighting now. Anyone electrically inclined(not me) should try this out, it does work well.

BTW i don't think there is much to worry abouyt with three gauges, I took a reading toward the beginning of this thread and I was only seeing about .5 amp with all three gauges hooked up. If someone who knows what they are doing and has three omori's could verify this i would really appreciate it. -James

Last edited by jjunior887; 04-29-2003 at 08:37 PM.
jjunior887 is offline   Reply With Quote
Old 04-30-2003, 08:27 AM   #54
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

i nominate this thread for a sticky, or a FAQ submission, since it seems like a fairly common problem and an elegant solution!

ken
ride5000 is offline   Reply With Quote
Old 05-29-2003, 09:37 PM   #55
Scoob
Scooby Specialist
 
Member#: 6204
Join Date: Apr 2001
Location: In the "313"
Vehicle:
2002 WRX Sedan
WR Blue

Default Little black box

Don, when you nail this little black box down, can I get one please?

Cheers,

Scoob.
Scoob is offline   Reply With Quote
Old 05-29-2003, 09:47 PM   #56
jjunior887
Scooby Specialist
 
Member#: 16738
Join Date: Mar 2002
Chapter/Region: MAIC
Location: Charles Town, WV
Vehicle:
2015 WRX Limited
CWP

Default

Hey vrg3, where did you get the blue plug in the pic? It looks like it would work for our cars too.
jjunior887 is offline   Reply With Quote
Old 05-30-2003, 01:12 AM   #57
vrg3
Scooby Specialist
 
Member#: 25796
Join Date: Oct 2002
Location: Cleveland, OH
Vehicle:
2012 Impreza

Default

I just looked in my tub o' Subaru stuff. I think it came off a random engine wiring harness I had. There are a lot of 2-pin connectors on our cars (and other cars, especially Japanese ones) that are identical to these.

If it wasn't off an engine wiring harness, it must have been a stock speaker connector for some car.
vrg3 is offline   Reply With Quote
Old 06-06-2003, 06:18 PM   #58
svelt
Scooby Newbie
 
Member#: 35693
Join Date: Apr 2003
Location: wi
Vehicle:
03 wrx wagon
white

Default

I made the Omori meter light dim with the stock lamps by using a transister to invert the variable voltage; so when stock lights are dimmed meter lamp dims ~ applies a varying positive voltage controled by the varying neg voltage.
svelt is offline   Reply With Quote
Old 06-06-2003, 06:56 PM   #59
Scoob
Scooby Specialist
 
Member#: 6204
Join Date: Apr 2001
Location: In the "313"
Vehicle:
2002 WRX Sedan
WR Blue

Default

Can you post a circuit digram for us non elec. engineers? Thanks!

Scoob.
Scoob is offline   Reply With Quote
Old 11-23-2003, 12:12 PM   #60
turboICE
Scooby Specialist
 
Member#: 33979
Join Date: Mar 2003
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2006 STi
WRB

Default

Bump for those looking to dim Omori lights.
turboICE is offline   Reply With Quote
Old 11-27-2003, 02:08 AM   #61
SilverJA
Scooby Newbie
 
Member#: 11544
Join Date: Oct 2001
Chapter/Region: RMIC
Location: West Haven, UT
Vehicle:
93, 05, 16 Taco TRD
01 RS 02 WRX 06 XT 08 STi

Question

Would anybody be willing to make and sell one of these transistor/converter things, like the one vrg3 made?

I just want to get my gauges and dash to work in sync.

Any help of further insight is appreciated.

Thanks
Joel
SilverJA is offline   Reply With Quote
Old 01-14-2004, 07:42 PM   #62
breed
Scooby Newbie
 
Member#: 8929
Join Date: Aug 2001
Location: LA, CA
Vehicle:
2002 WRX Sedan
Silver

Default thanks!

(*really* glad I found this thread as it helped me immensely on my Omori install in my WRX)

Thanks vrg3! and the rest of you (jehcpa, jjunior887, Thaison) for your input. I just made the do-hicky with the 741 and TIP31 transistor--works great! I'm using it to dim my Omori EGT and boost gauges mounted in an Autometer instrument bezel

pics here

One question... I left my EGT sensor unplugged since I don't have the manifold tapped yet. Is it safe to do that? The EGT registers its max when I do this......
breed is offline   Reply With Quote
Old 01-16-2004, 04:34 AM   #63
vrg3
Scooby Specialist
 
Member#: 25796
Join Date: Oct 2002
Location: Cleveland, OH
Vehicle:
2012 Impreza

Default

Joel - I know I'm a month or two late... but I just PM'd you.

breed - Awesome. Glad it's working for you.

It should be okay to leave the EGT sensor unplugged, but why not just cut power to the gauge itself to be safe?
vrg3 is offline   Reply With Quote
Old 01-16-2004, 01:07 PM   #64
skivvie
Scooby Newbie
 
Member#: 29719
Join Date: Nov 2002
Location: Draper, UT
Vehicle:
'06 WRX Wagon
Silver

Default

Someone really needs to submit a circuit diagram for this to Scoobymods.com! My gauges are coming in next week, so if no one steps up before i get them installed i'll do a write up.
skivvie is offline   Reply With Quote
Old 01-16-2004, 08:52 PM   #65
Scoob
Scooby Specialist
 
Member#: 6204
Join Date: Apr 2001
Location: In the "313"
Vehicle:
2002 WRX Sedan
WR Blue

Default

Check page 2, there's a link with a circuit diagram in there.. I missed it too, only found it yesterday! Duh!

Scoob.
Scoob is offline   Reply With Quote
Old 02-16-2004, 05:28 PM   #66
Moondongle
Scooby Newbie
 
Member#: 39552
Join Date: Jul 2003
Chapter/Region: BAIC
Location: Santa Cruz, CA
Vehicle:
2003 WRX Wagon
WRB

Default

I tried to get my circuit to work with my electrical Omori gauges but couldn't. Can those that are running the electrical Omori's tell me how you hooked up the Omori harness? There are five leads on the Omori harness. White, Red, Brown, Black (2pcs). To get the gauges to read properly, I made the following connections. White to the switched light power in the Subaru harness. Red to an ignition power source in the fuse box. Black leads were grounded, and brown wasn't used. The gauges read and work fine. The gauge lights turn on and off with the car lights, but do not dim.
Any help would be greatly appreciated.

Thanks.
Moondongle is offline   Reply With Quote
Old 02-16-2004, 08:27 PM   #67
turboICE
Scooby Specialist
 
Member#: 33979
Join Date: Mar 2003
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2006 STi
WRB

Default

You have connected properly.

They will not dim because Subaru dims dash lights through the ground & Omori does not provid a backlight ground as both black wires are connected internally - kind of the topic of this entire thread...

You would need the circuit being discussed which will convert the ground based dimming into a v+ source dimmer to dim your gauges.
turboICE is offline   Reply With Quote
Old 02-16-2004, 08:29 PM   #68
vrg3
Scooby Specialist
 
Member#: 25796
Join Date: Oct 2002
Location: Cleveland, OH
Vehicle:
2012 Impreza

Default

Uh, Moondongle did build the circuit to reverse the illumination voltage, so he doesn't need a separate backlight ground. He just needs a clearer explanation of which wire is which than is provided in the Omori "documentation."
vrg3 is offline   Reply With Quote
Old 02-16-2004, 08:39 PM   #69
turboICE
Scooby Specialist
 
Member#: 33979
Join Date: Mar 2003
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2006 STi
WRB

Default

That was not entirely clear in his post given the connections he made, I apologize.

The red is the power for the gauge and if an electrical gauge also for the sender.

White is the power for the backlight.

The black provides ground to both the gauge power (sender) and also the backlight.

The brown is for an external warning light for the 60mm gauges but is included on all harnesses even ones that don't have the output.

The white would need to receive its signal through the circuit if it is being used - the current connection does not sound like the circuit is being used.
turboICE is offline   Reply With Quote
Old 02-16-2004, 08:47 PM   #70
vrg3
Scooby Specialist
 
Member#: 25796
Join Date: Oct 2002
Location: Cleveland, OH
Vehicle:
2012 Impreza

Default

So connecting red to +12v, white to the output of the circuit, and black to ground should work?
vrg3 is offline   Reply With Quote
Old 02-16-2004, 10:05 PM   #71
Charged Performance
Vendor
 
Member#: 40645
Join Date: Jul 2003
Location: Jersey City, NJ
Default

OEM lighting + goes to illum +
OEM lighting ground goes to illum -
Omori white wire would go to out
Ground of course goes to ground

Omori red will go to an ignition on hot wire
Omori black goes to ground

If the circuit works as advertised and is connected properly then you should get the expected results.
Charged Performance is offline   Reply With Quote
Old 02-16-2004, 10:57 PM   #72
skivvie
Scooby Newbie
 
Member#: 29719
Join Date: Nov 2002
Location: Draper, UT
Vehicle:
'06 WRX Wagon
Silver

Default

I've got pics and am working on a write up for this right now, expect it this week.
skivvie is offline   Reply With Quote
Old 02-16-2004, 10:59 PM   #73
Moondongle
Scooby Newbie
 
Member#: 39552
Join Date: Jul 2003
Chapter/Region: BAIC
Location: Santa Cruz, CA
Vehicle:
2003 WRX Wagon
WRB

Default

turboICE: Sorry I wasn't clear in my post regarding my connections. After much frustration, I just gave up the dimming circuit and connected the gauges to work, hence my connections direct from Omori harness to Suby harness.

Thanks for clarifying the Omori harness. I couldn't make heads or tails of the brown lead. Now it makes sense. Let me just reiterate with Charged Perfomance posted here to make absolutely sure.

OEM + (Switched lights) connects to VRG3 circuit Illum +
OEM - (Dimming Lights) connects to VRG3 circuit Illum -
Omori White connects to VRG3 output lead
Omori Black is grounded
Omori Red connected to ignition switched power
Omori Brown connects to external warning lamp if desired

Thanks for the help.
Moondongle is offline   Reply With Quote
Old 02-16-2004, 11:34 PM   #74
Charged Performance
Vendor
 
Member#: 40645
Join Date: Jul 2003
Location: Jersey City, NJ
Default

turboICE is my personal account - sometimes when checking PMs I end up posting along without realizing the user id I am under.

Yes your reiteration is accurate - adding that the VRG3 itself has a constant ground connection that needs to be made as well at the bottom of the schematic.

We have not tested this circuit but others said it had worked.

You did connect the gauges properly for use without the circuit in your original post - the only wire you change when using the circuit is the one that the white wire connects to.

Ed.
Charged Performance is offline   Reply With Quote
Old 02-17-2004, 12:07 AM   #75
Moondongle
Scooby Newbie
 
Member#: 39552
Join Date: Jul 2003
Chapter/Region: BAIC
Location: Santa Cruz, CA
Vehicle:
2003 WRX Wagon
WRB

Default

OK. I'm now clear and thanks for your help. I'll try these connections when I have the new circuit. I may have fried a chip either soldering or trying different connections, so I'll try it with a fresh one.
Moondongle is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
head light dim question wrxturbo04 Electrical & Lighting 1 08-26-2007 11:00 AM
ATTN Elec gurus -- ILLUM(-) questions.. Dendrobium Electrical & Lighting 5 03-11-2005 06:31 PM
hod di i get my omori elec.gauges to dim?? StarDogChampion Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 6 11-24-2002 07:27 PM
Attn. Turbo Gurus - uppipe question M_Annequin Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 0 07-01-2002 02:35 PM
Attn Paultg!!! Trunk Light question kevinsUBARU New England Impreza Club Forum -- NESIC 3 09-05-2000 12:15 AM

All times are GMT -4. The time now is 06:00 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.