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Old 01-14-2013, 08:30 PM   #1 (permalink)
Rockhead
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Puddle and footwell lamps installed

$60K and no footwell lights. You gotta love GM.

This is an install post as a follow-up to an old thread with lots of props to heymccall and diesail for their help...

Old thread here: https://www.dieselplace.com/forum/sho...d.php?t=468467

The subject vehicle is the one in my sig - a 2013 GMC Sierra Denali LML.

I got the LED's from http://www.oznium.com/, using the square modules for the footwells and strips for under the running boards. Total cost shipped was $93.71.



Those four squares came as one piece - I cut them apart prior to the picture. I originally intended on using two per side in the front wells, but they were bright enough to get away with one.



The strip lights can be cut every 3 LED's and both sides can be used. I needed to trim two of them to fit where I wanted them under the rear doors, so I ended up using the leftover pieces as rear footwell lights.

The first thing I did was figure out where I was gonna tap into the dome light circuit. Here's the junction block under the driver side dash:



On the right side, second one from the top is connector X-9. See the two grey wires in the #8 position? You want to tap one of them, doesn't matter which.



Note to heymccall - I know you directed me to X-12/5, and I confirmed that with the electrical diagram. For whatever reason, I did not get voltage at that terminal (or X-12/6) with the dome light on. X-9/8 did exactly what I needed.



I grabbed a ground here (X-12/8, fat black wire)



I tested the LED strip with the tapped domelight circuit to see if it dimmed along with the incandescent lamps. It did.



Time to run wire and mount lights. There's a nice big hole in the floor with a nice big grommet in it, just ahead of the driver seat. This is for the shifter cable.



A little WD-40 and the wire pushed right through with the help of a big flat blade screwdriver.

I used 22 guage twisted pair in a teflon sheath - basically plenum rated data cable - running it under the carpet to the door sill, then into the kick panel and up under the dash.

Now that the wiring was under the truck, I split it and ran up the driver side fender well, along the firewall, and down the passenger fender well to get to the other side. I didn't want risk going across the bottom of the truck with all that hot crap under there.

I added a second run from the junction box and under the carpeting to get under the seats to the front seatbacks. By carefully prying at the trim on the seatbacks I was able to tuck the wiring away completely.

Here's a 6-LED segment mounted with 3M tape to the front seatback. Yes, it's wired:



Here's the same segment as seen from the rear floormat:



This is the other side:



Here's the passenger side footwell light mounted to the bottom of the glovebox:



And here's the driver side:



The whole process took me the better part of 6 hours. I soldered and heat shrinked every connection with the exception of the two taps into the harness. It looks and works great, and they're BRIGHT!

Believe it or not I couldn't get a decent picture of the strip lights under the running boards with my crappy Droid X camera. Please watch the video instead:

https://www.youtube.com/watch?v=J9RdwFMlQDs






Last edited by Rockhead; 01-14-2013 at 08:40 PM.
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Old 01-15-2013, 01:50 PM   #2 (permalink)
BrennanK
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Very nice install, looks great! I really like how you added in outdoor lighting across the whole cab as well vs. the typical under mirror puddle lights.
I have been thinking about doing this add on myself. You have inspired me to get going.

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Old 01-15-2013, 02:19 PM   #3 (permalink)
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Looks good. Are they cool white or the natural? May be the camera, but the light output looks different between the front and rear footwell lights.
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Old 01-15-2013, 02:44 PM   #4 (permalink)
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Sweet...Now you need to add one under each corner of the rear bumper, and, under the bed rails
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Old 01-15-2013, 03:05 PM   #5 (permalink)
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I like that. I'm in the process of upgrading my '06 to trim level equal to my '11 'Burb LTZ, interior trim, in dash radio/nav/dvd , etc. Gonna have to do this when I take the seats out for new covers.

In fact, my Burb is gonna get the running board lights as well.
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Last edited by rodknocker; 01-15-2013 at 03:07 PM.
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Old 01-15-2013, 03:14 PM   #6 (permalink)
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I was thinking about this a little and I thought of something. Because you tapped into your dome light circuit, when ever you turn on the dome lights using the dash dimmer roller you will turn on the outside lighting as well. I do this more often then clicking the laps on individually, I just flick the dimmer thing all the way up and it turns on all the interior lighting. Now if you do that while driving you will be rolling down the road with your white LED under glow.

Would you be wiling to post a picture or two of how you attached the LED's under the cab. I am curious if the 3M tape will hold up to the elements, unless you mounted those differently.
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2005 Black GMC Sierra 2500HD SLT - CCSB
Installed:
AUX Radio Input (iSimple ISGM535) - High Idle Mod - Head Gaskets (June [email protected]) - OEM Cab Lights - LBZ Mouth Piece - All On Headlight Mod - Puddle and Footwell LED's - OEM Towing Mirrors - Uniden BCT15x Scanner - Gauges in Trippin' Overhead mount - Rigid Industries Dually Backup Lights - UC6 radio with LUX amp
-Stock tuning and staying that way

Future:
LBZ door badges, Kennedy lift pump, aux CAT filter
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Old 01-15-2013, 03:54 PM   #7 (permalink)
Rockhead
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Quote:
Originally Posted by Duratys View Post
Looks good. Are they cool white or the natural? May be the camera, but the light output looks different between the front and rear footwell lights.
Good eye. The strips are warm white. I used them under the boards and ended up using the cut pieces in the rear footwell, so you are correct - different color and output between front and rear footwells. I originally intended to use the squares in the rear, but I had trouble finding a viable mounting surface. I didn't plan it thiis way, but when I saw how nicely the strips fit on the seatback I knew I had to do it. In hindsight I think I might have ordered the strips in cool white just so everything matched.

Quote:
Originally Posted by BrennanK View Post
Would you be wiling to post a picture or two of how you attached the LED's under the cab. I am curious if the 3M tape will hold up to the elements, unless you mounted those differently.
I'll post a pic if you like, but there's nothing to see. The strip lights come with a couple of cheap plastic clips that looked like they wouldn't make it out of my driveway. I used waterproof, "permanent" 3M tape on everything. I prepped the board and seatback surfaces with Windex followed by some Wil-Bond, a liquid deglossing agent that has never failed me. Pressed the lights on and that was that.
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Old 01-15-2013, 04:24 PM   #8 (permalink)
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Quote:
Originally Posted by BrennanK View Post
I was thinking about this a little and I thought of something. Because you tapped into your dome light circuit, when ever you turn on the dome lights using the dash dimmer roller you will turn on the outside lighting as well. I do this more often then clicking the laps on individually, I just flick the dimmer thing all the way up and it turns on all the interior lighting. Now if you do that while driving you will be rolling down the road with your white LED under glow.

Would you be wiling to post a picture or two of how you attached the LED's under the cab. I am curious if the 3M tape will hold up to the elements, unless you mounted those differently.
The dome override button gets lost in the sea of black dash, so, on my trucks, I always just reach up and activate a map light.
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'13 Hyundai Genesis Coupe handshaker
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Originally Posted by GetSome8.1HD
Its not like I said I enjoyed reading Good Housekeeping while taking a candle lit bubble bath then proceeding to using a loofah with exfoliating creams all while thinking about you . Now THAT would be creepy
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Old 01-15-2013, 04:55 PM   #9 (permalink)
Rockhead
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Quote:
Originally Posted by Duratys View Post
Looks good. Are they cool white or the natural? May be the camera, but the light output looks different between the front and rear footwell lights.
Now that I've thought about it some more, I'm gonna get another strip light in warm white, cut it in half, and use it in the front footwells. This way everything will be warm white. Thanks for noticing!

As for the four cool white squares, I'll probably use one with a mercury switch under the hood, another with a pin switch in the glove box, yet another inside the armrest cubby, and the fourth one will probably end up inside the Tour Pak on my '12 ElectraGlide!
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Old 01-15-2013, 06:41 PM   #10 (permalink)
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