Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

info about T one connector for trailer wiring to power aux lights

Recommended Posts

Has anyone used this connector for the trailer wiring harness? I'm not even sure what its called, but I found this one on Amazon. I want to get the extra flat connector to power some aux lights. I'm concerned if this will give me any issues down the road with a short or corroded connectors behind the bumper.


Also, I have never removed the 7 pin connector from behind. Does this thing really just pop into the outlet in the bumper? they only have this one crappy image so I can't really tell what I'm getting.


I'm just looking for confirmation that this will work as well/ easy as I think it will before I purchase it. Thanks in advance.










Link to comment
Share on other sites

nothing wrong now. I just want an additional flat connector below/ behind the bumper so I can run power to some lights without having to splice wires. I also don't want to connect to the regular plug that is built into the bumper and have exposed wires visible from the exterior.


The idea is to have a safe reliable auxiliary plug for lights, while leaving the stock trailer plugs open & operational.


also, to clarify, last year I ran a strobe light for plowing from my trailer plug. Since I remove it when winter's over, I want it to be removable, aka, not hard wired.

Link to comment
Share on other sites

What kind of lights are you planning to use, what purpose?

How many amps will they drew, or if you know how many watts you can calculate the current draw.

What kind of fused protection are you planning?

Are planning on a relay to trigger the lights?



Sent from my XT1254 using Tapatalk

Link to comment
Share on other sites

My intention is to use some small LEDs for backup lights. So no additional load above what a trailer would draw. I will never use the strobe light while pulling a trailer. That's kind of why I want the plug to remove it when I'm not plowing.


no relay, I would just use the existing reverse light circuit for the trailer to power the back-up lights and continue using the tail-light circuit for the strobe (it worked for me last winter)

Link to comment
Share on other sites

Bump. Anyone out there using one of these?

It's not plug and play, sorry. For what you want, you will have remove wiring harness for your 7 pin plug and splice in your 4 prong into those wires.


If you're not comfortable enough spicing wires correct, I would suggest a auto audio store or a place that installs receiver hitches. They will splice in, shrink wrap and then put it back in a protective sheath.


Your only other option would be t-wire splices. A little connector that splices one wire and T's off that wire.


So to run your reverse led light bars, you would need to splice into the reverse light wire for your power wire, then Just find a good ground. Prob a self tapping screw to frame. That will complete your circuit for your light bar

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Content

    • By Disposable
      Any help before I have to leave the truck at the dealer for a few days would be great. 
      2017 Silverado
      Dual 7 pin and 4 pin connector
      Test the 7 pin :  8 volts when grounded to the wiring harness
      Test the 4 pin : 7-8 volts when grounded to the wiring hardness
      Test the 7 pin :  8 volts when grounded to the Frame
      Test the 4 pin : 7-8 volts when grounded to the Frame
      7-8 Volts on when testing at the fuse panel  under the hood. Grounded to the engine block. 
      Relay seems good, all 4 fuses are good.  Other Fuses like lights, radio and wipers all bring back 12v range. 
      I am not sure where to go from here. I don't want to miss a ground wire or something. 
      I did clean and re-attach the ground wire next to the brake controller under the rear of the truck. 
    • By Danny From Canada
      I’m looking at purchasing a ‘22 Elevation.   Unfortunately the truck I’m looking at isn’t equipped with the dual exhaust/bumper, which is what I want.  It just has the regular pipe out the side.   Does anyone know if the dealer can swap out the bumper and add the dual exhaust?  
    • By Nathan Gwin
      First time posting on here, I’ve tried Facebook for answer and have gotten nowhere. 
      I have seen all of the cargo/reverse light mods and can’t seem to find what I’m looking for. 
      I am wanting to add a set of reverse bumper lights to my truck, my problem that I’m trying to figure out is I want to either add a switch on my dash or use the existing cargo lamp switch to power them. I am only wanting my reverse lights to come on when I put my truck in reverse or turn the cargo light switch on but when I put my truck in reverse I do NOT want my cargo lights to come on. I want to be able to use my bumper lights anytime I please no matter if I’m parked or driving down the road but I also don’t want my tail light reverse lights to be on when I turn the switch on. Only when I put my truck in reverse do I want the factory reverse lights on, I don’t want them to be on if I’m driving down the road. I also don’t want my truck to display the R on the dash if I’m driving down the road and I turn them on. 
      I figure I’m gonna need a couple of relays and diode or two but I not exactly sure what I will need or how to add them all to the truck and it function how I want it. 
      I want to be able to add a switch into the bed for the bed lights as well so I need the cargo/bed light switch that I add to work with this setup I’m wanting to add. 
    • By Nathan Vega
      Please  help can not find where this go or what the wires go to 2000 gmc 1500 5.3

    • By chargedbird
      Greetings all,
      I have a 1997 1500, with a 8 5/8 diff and I am looking for part numbers / vendors to purchase the rear Pinon Seal and Oil Fill Plug. Yes,  I have searched but I am coming up with all kinds of Seals and not sure what size the oil fill plug is.  
      Since I am replacing the real pinon seal, is there anything else I should inspect / replace.  
      Any and all information will be greatly appreciated. (if you need  the VIN to find the correct parts, here it is 2GTEK19R4V1537117)
      Thank you!
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    Total Topics
    Total Posts
  • Member Statistics

    Total Members
    Most Online
    Matthew June
    Newest Member
    Matthew June

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.