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Old 06-28-2011, 08:33 PM   #1 (permalink)
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Default How to install LC-1 DB Gauge

How to install DB gauge for your LC-1 Wideband
Start off by wiring up your LC-1 wideband. You can refer to my How-to guide here:
How to wire LC-1 into civic
Run the red wire to an ignition switched 12v source. I used the yellow/green striped wire off the cig lighter connector

Run the black wire to the same ground used as the white wire from the LC1 wideband controller. In my install this is obd2 pin A9 - ecu ground - (brown/black stripe).

Run the blue wire to the wideband signal from the LC1 wideband controller. The gauge is preprogrammed to: 0v=7.35afr, 5v=22.39afr. Since I use my Analog 2(wideband - brown wire) on a 0-3.5v scale, I decided to reprogram my analog 1 narrowband output (yellow wire) to match the scale that is preprogrammed on the db gauge. I have multiple o2 bungs in my exhaust and would not need to use the narrow band output from my LC1 for closed loop. Your installation may vary depending on your needs.

Run the purple wire to a wire that supplies current to the headlights. This is usually a red/black stripe wire. Doing it this way will allow the gauge to dim when the headlights are turned on. If you do not want this behavior you can just run this to a chassis ground.

Gauge side of the wiring.

Installed and finished product.


Congrats you have successfully installed the db gauge for LC-1 Wideband. You can now ride around and watch your wideband AFRs.

EDIT: I had an html table with a quick lookup for the wiring but not sure how to post a table on bb

-Luke
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Old 06-28-2011, 08:35 PM   #2 (permalink)
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And as always, this along with all of my other writeups and guides are available on my website:
lukekailburn.com: Honda project info and How-to's

-Luke
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Old 06-29-2011, 07:00 AM   #3 (permalink)
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nice work, Next time try some wire heatshrink instead of electrical tape, unless you soldered the wires under the tape
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Old 06-29-2011, 08:12 AM   #4 (permalink)
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Originally Posted by Evanguy View Post
nice work, Next time try some wire heatshrink instead of electrical tape, unless you soldered the wires under the tape
yep all wires are stripped about 1/3", wrapped over each other and then soldered. Heatshrink would still be baller but electrical tape is cheap

-Luke
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Old 06-29-2011, 08:16 AM   #5 (permalink)
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DIY KING does it again! =D
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Old 06-29-2011, 08:23 AM   #6 (permalink)
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DIY KING does it again! =D
haha i'd rep you for being such a loyal diy follower but it says i gotta spread the love

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2005 Legacy GT

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Old 07-08-2011, 08:16 PM   #7 (permalink)
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awesome i used the 1st half of this and did my DB on my own, Great write up again man, + rep!!!
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Old 07-09-2011, 03:19 PM   #8 (permalink)
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should groud the lc1 at the t-stat so there is no voltage offset if you are going to log it other then that not bad
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Old 07-10-2011, 07:53 PM   #9 (permalink)
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good write up
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