Where Does Brake Controller Install 2018 GMC Sierra

Question

Question:

Hi Folks I have a 2018 GMC Sierra 3500 with factory integrated brake controller, which fails frequently. Approximately end of June or early July 2021, I bought the Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional, Part #90195. I also bought the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers Item # 3016. I bought this as a back-up. You can see my question when I bought this at: https://www.etrailer.com/question-523521.html?fb=yes I mounted the controller and ran blue wire through conduit from under the drivers dash to the rear of the truck where the trailer wiring splits to two plugs - one above the rear bumper and one in the truck bed. I continued to use the factory system until it failed this morning. I assumed the hardest part is running the blue wire to the rear, which was completed a year ago so I could just plug, do a few wire splices and go. I pulled the cover off where it is supposed to plug in. Im uncertain where it plugs in, and there is a yellow wire already connected to where I thinkfoot the plug on the Plug-In Wiring Adapter is supposed to go. Tell me if I have the correct place to plug the in. Im attaching pictures. Im hopeful that you can confirm that the plug does go where the yellow wire is, and that you can tell me what the yellow wire is for and where it should go after I plug in the Plug-In Wiring Adapter. Any help would be appreciated.

asked by: Dave K

1

Helpful Expert Reply:

The port you have circled in your picture is the correct location to install the # 3016 on your 2018 GMC Sierra 3500. IT is really odd you have a random yellow wire ran to it currently and it's hard to say what it is there for but if you pull it out and test the pin it plugs into with a # PTW2992 to see when it has voltage you might get a clue. My guess is there's something aftermarket installed on the truck that is using that pin as a 12 volt power source like a stereo amp.

expert reply by: Jameson C

1

Junction Box 2018 GMC Sierra Brake Controller
(click to enlarge)

Answer 1

If your Tekonsha P3 Brake Controller, part #90195, displays the error message OUTPUT SHORTED NO BRAKES, the potential causes are a short in the brake output circuit somewhere between the brake controller and the trailer brake assemblies, or a shorted…

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Answer 2

The factory brake controller port on your 2018 Chevy Silverado 1500 is in your vehicle's junction box underneath the dash, to the left of the steering column, just above the carpeting. If you take a look at the accompanying photo you can see…

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Answer 3

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 6

Hey Richard, thanks for reaching out! The Dexter DX7.5 Drop-N-Go Brake Actuator #099-175-00 is a great option for a replacement actuator because it's a direct replacement for the common Model 60 actuators that were popular in the '90s.…

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Answer 7

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Answer 8

I currently have three diffrent self-adjusting assemblies for your boat trailer with 10" x 2-1/4" electric drum brakes which are attached for you below. eTrailer Electric Trailer Brake Kit part #AKEBRK-35-SA (3,500 Axles) Dexter…

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Answer 9

Based on the GVWR of your 2019 Jayco North Point 315RLTS it does seem like you have 7k axles. I recommend verifying this information to be sure. These axles typically use the #14125A outer and #25580 inner bearing found in the Timken #TMK92VR.…

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Answer 10

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 11

The recommended lug nut torque for your 7,000lb axle depends on a few factors like wheel size, stud size etc. Check out the attached photo which shows the torque specs for a variety of applications. I see you were looking at the Dexter Nev-R-Adjust…

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Answer 12

Traditionally, trailer manufacturers did not use electric brakes on boat trailers because the brake magnet wiring and trailer wiring did not always have the best insulation or water protection. These days, more and more manufacturers are using…

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