#PIT5282F: Procedure for Installation of an Aftermarket Trailer Brake Controller or In Lieu of Factory Trailer Brake Controller

(Dec 19, 2019)

Subject: Procedure for Installation of an Aftermarket Trailer Brake Controller or In Lieu of Factory Trailer Brake Controller

Supersession Statement

This PI was superseded to add the 2020 models. Please discard PIT5282E.

Condition/Concern

Some customers may request to have an aftermarket trailer brake controller added to their vehicle, OR an aftermarket trailer brake controller added in lieu of the factory integrated trailer brake controller (ITBC) (RPO JL1).

Recommendation/Instructions

Obtain a trailer brake controller harness, GM Part # 23184088, as shown below.
Connect the harness to the MID-BEC (X61A). The MID-BEC is located under the I/P to the left of the steering column. The harness connection point (1) is illustrated below.
The trailer brake controller harness consist of 4 blunt cut wires and a label that calls out the wire colors and each wire’s function, also shown below. Use these 4 blunt cut wires to connect to the aftermarket trailer brake control.
Perform this step ONLY if equipped with RPO JL1 where the customer is requesting the factory trailer brake system be bypassed to add an aftermarket trailer brake controller. Locate connector X185 Or X138 (varies with vehicle build; refer to SI), which is near the underhood fuse block, terminal 32. Circuit 47 ends at the body harness side of X185 or X138 terminal 32, which comes from the X61A junction block. Obtain enough Dark Blue 12 gauge wire to run from X185 or X138 to the 7-way trailer connector at the bumper. Attach terminated lead part number 13327155 to one end of the Dark Blue and insert into the chassis harness side of the X185 or X138 connector terminal 32. Run the Dark Blue wire in its own conduit along the frame to the 7-way trailer connector at the bumper. Remove circuit 47 from the 7-way trailer connector terminal “C” and tape the bare terminal and attach to the harness. Attach terminal part number 12110853, located in Delphi Tray 4, to the other end of the Dark Blue wire, with the correct weather pack seal, and insert it into the 7-way trailer connector terminal “C.”

Warranty Information

If the customer wishes to have an aftermarket brake controller installed in their vehicle, it would be considered as a Customer Pay option.

From GM:

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

Explore Expert Info

on Trailer Brake Controller

Videos

for Trailer Brake Controller

Help Articles

for Trailer Brake Controller

Expert Answers

for Trailer Brake Controller

Choosing the Right Trailer Wiring

K Source Universal Clip-On Towing Mirror Installation - 2020 Ford F-150

K Source Dual Lens Universal Towing Mirrors Review

Choosing the Right Brake Controller

Trailer Brake Controller Installation - 2006 Dodge Ram Pickup

Best 2016 Toyota RAV4 Towing Mirror Options

K Source Universal Clip-On Towing Mirror Installation - 2020 Toyota RAV4

Trailer Wiring Harness Installation - 2001 Toyota Tundra

Trailer Brake Controller Installation - 2002 Toyota Tundra

Trailer Brake Controller Installation - 2011 Ford Van

Review of Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C55378

Trailer Brake Controller Reverse Light Lead Installation

Brake Controller 7- and 4-Way Installation Kit (ETBC7)

Brake Controller Installation: Starting from Scratch

Testing Brake Controls

Trailer Wiring Diagrams

Troubleshooting Brake Controller Installations

Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)

How Much Up and Down Play Is Normal With Fulton Fold-Away Coupler Hinge Kit FHDPB340301?

With the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs #FHDPB340301 installed you will get some up and down movement. Typically this should not exceed about 5 degrees, or 1-1/2" with tongue at the…

view full answer...

How to Install a Brake Controller on a 2001 Toyota Tundra SR5 With Factory Tow Package

To determine what additional equipment you will need to install a brake controller on your 2001 Toyota Tundra SR5, we will need to know how your truck is equipped. The tow package for the Tundra may have come with either a 4-way flat trailer…

view full answer...

Running Light Circuit on Output Side of Curt Wiring Harness Has No Power on 2000 Toyota Tundra

Use your tester to test the brown wire going into the converter for wiring harness #C55367. If there is no power going into the box then there is an issue on the vehicle wiring. There could be a blown fuse for the trailer running lights. Use the…

view full answer...

Determining Correct Wiring Harness for 2001 Toyota Tundra

I spoke with my contact at Curt regarding the correct wiring harness for your 2001 Toyota Tundra. He states that it is very likely that while your truck is labeled as a 2001 model, it was actually built in late 2000 with the 2000 model factory plug…

view full answer...

Which is Better the P3 or P2 Prodigy Brake Controller

The P3 brake controller part #90195 is functionally the same brake controller as the P2 part #90885 but comes with more features and a better display screen setup. So if you prefer a simpler screen setup that has a couple letters and dots to indicate…

view full answer...

Trailer Lights Not Working Using Curt 55367 on a 2000 Toyota Tundra

If nothing is working, then I would first check to see if any tow package fuses or relays are missing or blown. Use the owner's manual to find all fuse/relay locations. If that is not the issue, then it sounds like the previous owner has done a…

view full answer...

Availability of Custom Brake Controller Wiring Harness for 2000 Toyota Tundra

You can install a trailer brake controller like the #90885 on your 2000 Toyota Tundra, but this truck isn't equipped with a factory port behind the dash to allow for a plug-and-play installation. If you found a wiring harness under the dash it is…

view full answer...

What Is The Purple Wire Used For On The Brake Controller 7 & 4 Way Installation Kit #ETBC7

The purple wire on the adapter included with the Brake Controller 7 & 4 Way Installation Kit, #ETBC7, is an auxiliary wire and can be used as a 12 volt power source, to power a reverse light or reverse lockout function for trailer brakes if…

view full answer...

Location Of The Grey Fuse Holder Connector On A 2000 Toyota Tundra

The small grey connector that is attached to the red fuse holder wire on the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part #C55367 for a 2000 Toyota Tundra is located in the vehicle's engine compartment between…

view full answer...

Installing Trailer Wiring Harness On 2000 Toyota Tundra

The Curt T-Connector Vehicle Wiring Harness, part #C55367 is designed to fit the 2000 Toyota Tundra. The connector the harness attaches to is located behind the rear bumper. I have attached a photo that shows where the vehicle plug is located. In the…

view full answer...

Where Does Curt Trailer Wiring Harness Install on a 2000 Toyota Tundra

It looks like the connector you need is actually already plugged into something which I have pointed out in the picture you sent. The empty plugs on the right side do not seem to match the connector on the Curt wiring harness #C55367 for the 2000…

view full answer...

Troubleshooting Trailer Turn/Brake Signal Not Working on a 2014 Toyota Tundra

Thank you for all of the details, you have already done quite a bit of the work in narrowing down the problem. Since the common denominator in this situation is your 2014 Toyota Tundra the issue can be isolated to that. You should be getting 12V of…

view full answer...