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  1. #1
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    Default Is there a third brake light wire for a cap?

    My Dodge had a stubbed wire for a third brake light in a cap/camper shell sticking out of the main wiring harness. I think I have read that GM also has this, but I cannot find where I read that. I'm mounting lights on my toolbox, one of which is a tail/brake light bar (no turn signals).

    I'm looking to tie into that circuit on a 2012 2500HD...anyone give me an idea where I should look (or if this wire even exists?)?

  2. #2

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    When I pulled my headliner down to sound deaden it required me to also pull all of the wiring for the 3rd brake light. I know on my 04 1500 there was no stub for this. (It'd be easy enough to tap the third brake light wiring, though.)

    I don't know if 2500HD's and/or NNBS are different... I just know what I didn't see/find on my own vehicle ... and where I didn't find it. If it exists on my truck, maybe it's in another location?

    Surreal

  3. #3
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    Enkeiavalanche's Avatar
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    On my Avalanche I just taped into my factory 3rd brake light Then put a switch in so I could put the Factory light on when I'm camping in the back..

    Click image for larger version. 

Name:	IMG_1631resize.jpg 
Views:	2308 
Size:	29.0 KB 
ID:	39908If you look at the left side of the bed you can see the Thumb Switch.. NOW LOOK above and you can see the Factory Light..
    08 Z71 Avalanche Mods to date: K&N CAI,Hellwig Swaybars and End Links, Corsa Sport Exhaust, Superchips Programer,IPCW LOF & 3rd brake light and tails, AMI Gas door,Show Hooks and Door locks, Enkei Wheels, with Pirelli tires, StreetScene Bowties, Grant Steering wheel,Muth signal mirrors,SSBC Big Brake kit,Huskyliner Mug gards,Floor mats and Hood shield, McGard Lug nuts and locks, Bedrug, Cervini's Ram Air hood,35watt HID Fog lights, Sylvania bulbs all around ZXE's Highs and Lows, WhiteNight Back up lights,Sirius and HD Radio, SnugTop sitting on deck now Got a Softopper on now,Tempress Boat Hatches.... New Bilstein shocks are on... New Mods coming soon..... X

  4. #4
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    Default

    I found this thread...this is what I'm talking about...

    Hi,
    Newbie here.
    There is a 3rd light waterproof connector in the wiring harness at the back for toppers, but my local dealer says the pigtail to plug into it is 70 bucks! (at least here in canada).

    I hate to cut into the wiring and use a crimp connector as it will corrode pretty fast in the salt used on the roads in the winter. I've got some but connectors that self solder and shrink seal so I guess I'll try those.


    ---------- Post added at 10:30 PM ---------- Previous post was at 10:28 PM ----------

    http://www.etrailer.com/question-37192.html

    ---------- Post added at 10:32 PM ---------- Previous post was at 10:30 PM ----------

    http://www.etrailer.com/question-20223.html

    ---------- Post added at 10:32 PM ---------- Previous post was at 10:32 PM ----------

    http://www.etrailer.com/question-19219.html

  5. #5

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    Quote Originally Posted by Enkeiavalanche View Post
    If you look at the left side of the bed you can see the Thumb Switch.. NOW LOOK above and you can see the Factory Light.
    There's a light switch and a truck in that pic???

  6. #6
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    Enkeiavalanche's Avatar
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    Quote Originally Posted by SurrealOne View Post
    There's a light switch and a truck in that pic???
    Yep look where her Knee is pointing.. 1 flat 3 way switch. up for the 3rd brake light (Mood Lighting) down for the bright LED's under the rail..

  7. #7

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    Quote Originally Posted by Enkeiavalanche View Post
    Yep look where her Knee is pointing.. 1 flat 3 way switch. up for the 3rd brake light (Mood Lighting) down for the bright LED's under the rail..
    They have knees?

  8. #8
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    Ok here is a better pic... Click image for larger version. 

Name:	switch.jpg 
Views:	1916 
Size:	66.8 KB 
ID:	39963Switch is on the left side

  9. #9

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    The other pic was better, Enkei.

  10. #10

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    Quote Originally Posted by steved View Post
    My Dodge had a stubbed wire for a third brake light in a cap/camper shell sticking out of the main wiring harness. I think I have read that GM also has this, but I cannot find where I read that. I'm mounting lights on my toolbox, one of which is a tail/brake light bar (no turn signals).

    I'm looking to tie into that circuit on a 2012 2500HD...anyone give me an idea where I should look (or if this wire even exists?)?
    Check in the manual. I think that's where the location is listed. It could be on the d/s under front of bed, or d/s by the rear bumper depending on mdel and factory packages.
    Last edited by XS ive; 06-03-2012 at 12:58 PM. Reason: speeling... agin.

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