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How to Hook Up the Constant 12v Power for 7pin Trailer Plug

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How to Hook Up the Constant 12v Power for 7pin Trailer Plug

Postby aksierra11 [OP] » Jan 13 2011, 8:18am

I just purchased a product called White Night. They are rear facing lights that mount over the trailer hitch which plug into the factory 7 pin connector. While installing this I found out that from the factory the 7pin connector does not have the constant 12v connected. This is often used for trailers that would have lights inside or other accessories. This "How To" will show you were this wire is located and what is needed to get power to the 7pin connector.

Open the hood of the truck and locate the wire under the master brake cylinder. It will be sticking out and taped up up with electrical tape. Remove the tape and pull the wire free.
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Once the wire is free connect it to the black post on the front of the fuse box. The black post is for the auxiliary power, the silver one is used for hooking up electric brakes for a trailer.
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Use a nut to secure the connection
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You will also have to get a 40 amp fuse for the number 68 slot to allow power to the wire you just connected.
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And now a pic of the lights installed and working.
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Related Topics  12V 40amp hook up for trailer.   Does anyone know how to have 12V plug in run off ignition?   Trailer hook up illumination   12V Power   12v Charging Ports, Do They All Push / Draw The Same Power?   7 way trailer plug questions   2014 trailer plug on a 2013 Sierra   Curt T-connector and 7 pin trailer plug   Plug and play 02 does it have it,manual to power   Trailer power wiring question   constant ticking noise.   4WD Constant Clanging and Clicking-Accelerating and Stopping   Tow Hook Attachment.   Tow hook mod 
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Re: How to hook up the constant 12v power for 7pin trailer p

Postby koolz71 » Jan 13 2011, 1:58pm

I wonder if theres any difference on the 03-07 classic model
Crap, my hampster fell off the wheel and it broke its leg.

Check out my blog



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Re: How to hook up the constant 12v power for 7pin trailer p

Postby aksierra11 [OP] » Jan 14 2011, 9:24pm

Only way to find out would be to take a volt meter and see if it has power with the truck off. Or it could say something in the owners manual??
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Re: How to hook up the constant 12v power for 7pin trailer p

Postby CHEBBY » Jan 16 2011, 12:46am

AK do those lights come on with the backup lights when you put the truck in reverse? They are certainly bright & btw your truck is looking good!

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Re: How to hook up the constant 12v power for 7pin trailer p

Postby aksierra11 [OP] » Jan 16 2011, 1:21am

Ya there is a toggle switch on the back of the lights. They can be turned on manually at anytime or you can flip the switch so they only come on with the truck in reverse. Or you can have them off completely.
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Re: How to hook up the constant 12v power for 7pin trailer p

Postby CHEBBY » Jan 16 2011, 3:13pm

So the plug for the White Night piggybacks into the factory plug?

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Re: How to hook up the constant 12v power for 7pin trailer p

Postby Aridium » Jan 16 2011, 5:04pm

Thats an awesome how to. I literally just ordered one because I saw how you hooked it up :)
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I make exhaust noises in my sleep.... And not always out of my mouth. :)
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Re: How to hook up the constant 12v power for 7pin trailer p

Postby aksierra11 [OP] » Jan 16 2011, 8:58pm

CHEBBY wrote:So the plug for the White Night piggybacks into the factory plug?

chebby

Yup. It comes with another harness that you can tap into the stock wiring but I liked the idea of not having to splice anything. Plus if I want to it takes 2 minutes and I can completely remove the lights and it looks stock again.

*one thing to note, the wiring harness I used is something I ordered in addition to the lights, I believe it is like $15 bucks but well worth it.


Aridium wrote:Thats an awesome how to. I literally just ordered one because I saw how you hooked it up :)

Awesome! Glad it helped someone. You won't be disappointed with it.
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Re: How to Hook Up the Constant 12v Power for 7pin Trailer P

Postby toadman » Nov 30 2011, 5:03pm

Very helpfull information. One would think that a truck that comes with a towing package would be all set to go. Not the case with mine and the dealer didn't provide much information. Once again, a job well done with good pictures and good instructions.
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Re: How to Hook Up the Constant 12v Power for 7pin Trailer P

Postby aksierra11 [OP] » Nov 30 2011, 5:13pm

Not a problem. I was shocked it wasn't hooked up from the factory either, especially considering I payed for the max trailering package.
Last edited by Austin on Nov 30 2011, 8:30pm, edited 1 time in total.
Reason: What is the purpose of quoting the post directly above yours?
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