Tuson DirecLink Base Model Trailer Brake Controller - 1 to 4 Axles - Proportional
Tekonsha Custom Wiring Adapter for Trailer Brake Controllers - Pigtail - GM

Part Numbers: 335DL-100,3025-S

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Tuson RV Brakes Trailer Brake Controller - 335DL-100
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Tuson DirecLink Base Model Trailer Brake Controller - 1 to 4 Axles - Proportional
part number: 335DL-100

Brake controller activates trailer brakes in proportion to deceleration. Plug-and-play design automatically syncs to your vehicle's computer network for precise braking. Low speed brake adjustment. No directional mounting required.


  • Brake controller activates trailer brakes in proportion to your tow vehicle's speed, deceleration, and braking action
    • Automatically adjusts braking based on real-time data provided by your tow vehicle's computer network
    • Activates immediately - no pausing like with time-delayed brake controllers
    • Activates faster than accelerometer based brake controllers
  • Automatic leveling ability - module can be mounted in any orientation without affecting operation
  • 20 Braking levels let you adjust initial braking power and aggressiveness
  • Large color display acts as a diagnostic tool for your towable brake system
    • User-friendly, 1-7/8" color display is easy to read
    • Diagnostics include trailer connection, tow vehicle battery voltage, OBD-II network connection, brake controller ground and power connections, brake switch voltage, blue wire power output, engine RPM, low-speed brake adjustment, and transmission temperature (Ford & GM vehicles using VPW/PWM network protocols)
  • Spring-loaded manual override lever allows you to manually apply 0-100% of your trailer's brakes
  • Easy plug-and-play installation
    • Automatically configures to your tow vehicle and trailer brake system
    • No drilling required
  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Designed for use with electric or electric-over-hydraulic trailer brakes
  • Limited 2-year warranty

DL-100 Tuson Direct Link Basic Proportional Brake Controller - 1 to 4 Axles

Tekonsha Custom Wiring Adapter for Trailer Brake Controllers - Pigtail - GM
part number: 3025-S

Streamline the installation of your trailer brake controller with this custom adapter. Simply connect the wires of the harness to your brake controller and then plug the other end into the junction box beneath your Chevrolet Silverado's dash.


  • Pigtail wiring adapter eases installation of your electric trailer brake controller
  • Connector end plugs into the built-in port beneath the dash of your vehicle
  • Wire end connects to the wires on your brake controller with the included butt connectors
    • Compatible with time-delayed and proportional brake controllers from TrailerMate, Draw-Tite, and Tekonsha
  • Limited 1-year warranty

Installation of Tekonsha Brake Controller Adapter

To install your electric brake controller, you need to connect the wiring of the controller to your vehicle. Certain auto manufacturers offer pre-wired options, typically known as tow packages, wherein wiring is run for you from the dash to the trailer connector on the back of your vehicle. When this is done, a port is installed at your dash so that you can easily plug in a brake controller.

Installation 1Installation 2

This adapter plugs into the port that is built into the electric junction box beneath your vehicle's dash. The black box is located to the left of the steering column, just above the carpet. To plug in the adapter, first remove the cover on the box. The adapter plugs into the second slot from the left, on the top row.

To hook this adapter up to your trailer brake controller, just connect the 4 wires of the harness - ground, power, brake switch, and brake power - to the corresponding wires on the brake controller. If your brake controller came with a plug built into its wiring harness, you will have to cut off the plug and connect to the wires themselves.

3025-S Tekonsha Brake Control Pigtail Wiring Adapter - Single Plug - GM

Replaces Tow Ready 20263

California residents: click here

Customer Reviews

Tuson DirecLink Base Model Trailer Brake Controller - 1 to 4 Axles - Proportional - 335DL-100

Tekonsha Custom Wiring Adapter for Trailer Brake Controllers - Pigtail - GM - 3025-S

Average Customer Rating:  5.0 out of 5 stars   (6 Customer Reviews)

Brake controller activates trailer brakes in proportion to deceleration. Plug-and-play design automatically syncs to your vehicle's computer network for precise braking. Low speed brake adjustment. No directional mounting required. Streamline the installation of your trailer brake controller with this custom adapter. Simply connect the wires of the harness to your brake controller and then plug the other end into the junction box beneath your vehicle's dash.

- 3025-S
by: Kevin D07/22/2020

Works great one year later 848779

- 3025-S
by: John10/09/2018

Great product, worked perfectly 573062

- 3025-S
by: Gord05/31/2018
2001 GMC Sierra

Great service, and product worked excellent ! I work order again. 514227

working great. !
Gord - 05/31/2019


- 3025-S
by: Earl d.09/09/2017
2002 Chevrolet Avalanche

What can I say...no problems....the way everything should be. 430393

- 3025-S
by: Dave w.04/15/2017
2001 Chevrolet Silverado

Good 367758

- 3025-S
by: Mark H04/07/2016

Awesome service, fast delivery. I would highly recommend etrailer. ?? 243242


Ask the Experts about this Trailer Brake Controller

  • Will Tuson DirecLink Brake Controller Work with International Prostar Pulling 40 Foot Trailer
  • Yes, the Tuson DirecLink Base Model Trailer Brake Controller # 335DL-100 will work well for a 40 foot trailer that is equipped with 2 axles. This unit is compatible with trailers that have up to 4 axles (8 total brake assemblies). The DirecLink will simply plug into the OBD-II port and the pigtail harness will need to be spliced into the appropriate wires on your truck (see attached image). For your International Prostar you will likely need to add either the Module Kit # 335HDCON-6PIN
    view full answer...

  • Compatibility of Tuson Brake Controller With 2016 Subaru Outback
  • The Tuson DirecLink Base Model Trailer Brake Controller - 1 to 4 Axles - Proportional # 335DL-100 as well as the # 335DL-50 is compatible with the 2016 Subaru Outback. You will simply use # ETBC7 to add the 7-way connector, wiring, and circuit breakers. If you don't already have the 4-way wiring harness, then I recommend starting with # 118467. The difference is the # 335DL-300 has low speed brake adjustment.
    view full answer...

  • Where Is the Brake Controller Port On An Entegra Coach Vision Motorhome
  • The Entegra Coach Vision is built on a Ford F-53 Chassis which means there should be a pre-wired brake controller port under the dash. The exact location of this port can vary but most likely it will be on the left side of the steering column support which you can see shown in the attached photo. If you don't already have a brake controller in mind, the Tuson DirecLink Base Model Trailer Brake Controller part # 335DL-100 gets my approval as it is one of the most advanced controllers on
    view full answer...

  • Will the Tuson DirecLink Base Model Trailer Brake Controller Work On a 2020 Subaru Outback
  • The Tuson DirecLink Base Model Trailer Brake Controller part # 335DL-100 will work on a 2020 Subaru Outback. However, it would require you to splice into the vehicle which is not what I recommend. Instead, I recommend the Curt Echo Mobile Trailer Brake Controller part # C51180 which is plug and play so no splicing is required. In order to use the Curt Echo, you will need the T-One Vehicle Wiring Harness part # 118467 with the 7-Way RV Upgrade Kit for Trailer Brake Controller Installation
    view full answer...

  • Difference Between the Tuson DirecLink Base and Tuson DirecLink Lite
  • The main difference between the Tuson DirecLink Base Model Trailer Brake Controller part # 335DL-100 and the Tuson DirecLink Lite Trailer Brake Controller part 335DL-50 is that the Base has low-speed brake adjustments and transmission temperature monitoring on Ford and GM vehicles. The low speed brake adjustments allows you to adjust the amount of braking that the DirecLink applies at low vehicle velocities such as in town driving. The Tuson DirecLink is one of the most innovative brake
    view full answer...

  • Troubleshooting Tuson DirecLink Brake Controller on 2009 Freightliner
  • Just to make sure I am understanding correctly, you are getting the correct signals on the black, blue, red, and white wires on the Tuson DirecLink, like the Base Model # 335DL-100, but when you connect your trailer to your 2009 Freightliner it doesn't receive a brake signal from the controller. If this is the case then you simply need to test the wire that carries the brake signal from the controller back to your trailer. A typical 7-Way trailer connector should be receiving the brake
    view full answer...

  • How to Install the Tuson Direclink 100 on a 2011 Freightliner M2 102 DayCab
  • I may have a solution for you, but I checked our resources and we're not showing any brake controller adapters available to install a brake controller on the 2011 Freightliner M2 chassis. In all likelihood if there is a plug in for a brake controller it's somewhere under the dash, but I really can't tell you where in this case or confirm that there is one on this chassis. With that said, since there is no adapter available, if you were looking to use the Tuson Direct # 335DL-100 you
    view full answer...

  • Will the Tuson DirecLink Controller Work With Pressure Transducer On 2006 Chevy Silevardo 3500
  • The Tuson DirecLink Base Model Trailer Brake Controller part # 335DL-100 is an excellent top of the line option for a 2006 Chevrolet Silevrado 3500. It is a proportional brake controller which means it senses the deceleration of the tow vehicle and then applies a corresponding voltage to the trailer brakes. That said, this feature is controlled by an internal inertia sensor not a pressure transducer like your existing brake controller uses. The vast majority of electric trailer brake controllers
    view full answer...

  • What to Do if Something is Already Plugged Into Junction Box for Brake Controller on a 99-2006 Chevy
  • When using brake controller wiring harness # 3025-S there should not be anything plugged into the junction box in the required location (top row, second from the left). It should look like the picture I have included. But the truck likely came with a factory adapter and that is what is plugged in. If the wires do not lead anywhere then that is what you have plugged in and it can just be removed or shoved out of the way.
    view full answer...

  • Connection of Blue Trailer Brake Control Wire on a 2001 Chevy Silverado.
  • The blue wire is the brake feed wire for the trailer brakes. When you plug in the adapter, item # 3025-S if you need one, the wire is attached to the blue wire on the adapter which is connected to the blue wire on the brake controller. From under the hood the blue wire with the connector that needs to be cut off is ran to the 6-Way or 7-Way connector at the rear of the vehicle and attached to the brake circuit in the connector. If you use the Brake Controller 7 & 4 Way Installation
    view full answer...

  • Brake Controller Install Harness Recommendation for 2000 Chevy Silverado 2500
  • The harness you need is the part # 3025-S. You will wire the harness by color to your controller and then will plug the brown connector into the junction box under the dash of your truck. I attached a help article on installing controllers in your generation truck for you to check out as well.
    view full answer...

  • Troubleshooting Brake Controller on 2002 GMC Sierra 2500 HD
  • First, use a circuit tester like part # 40376 on the black wire exiting the rear of the controller to verify that power is reaching it. If not, there is a 20 or 30 amp fuse in the power distribution box, located under the hood on the drivers side fender, that is most likely blown. Once the fuse is replaced, you will want to inspect the brake output circuit on the trailer connector, tracing it back to the trailer brake magnets to determine what caused the fuse to let go. Skipping this step
    view full answer...

  • What Is Each Wire on the Universal Brake Control Wiring Adapter, item # 3025-S, Used For?
  • The # 3025-S Universal wiring adapter is not the correct adapter for the 2003 Chevy Silverado 2500 HD. The connector will fit but You will need to remove the blue locking clip and switch the red wire from the top left, looking at the connector with the locking clip in the down position, to the bottom right connector terminal (opposite corner). To get the red wire out you will need to press on a very small locking tab on the connection side of the terminal. This is the only change that will
    view full answer...

  • How to Wire a Brake Controller on a 1999 Chevy Suburban K1500
  • Your 1999 Chevrolet Suburban will need to be hard wired for installation of a brake controller. The Suburban did not get the wiring update that the pickup did until the 2000 model year, so the Universal Brake Control Wiring Adapter, item # 3025-S, will not work on your Suburban. You will need to splice the red wire from the back of the brake controller to the wire at the back of the brake pedal switch that carries power only when the brake pedal is pressed. You will also need to wire
    view full answer...

  • Do the Wires on the Brake Control Wiring Adapter Match Up Color for Color with the Brake Controller
  • Yes, the wires on the adapter, item # 3025-S, will match up, color for color, with the wires on your brake controller. If you have a proportional brake controller the brakes will not energize when setting still because the controller uses the forward momentum of the vehicle to energize the brakes with the appropriate amount of power to stop the trailer. The controller will need to be adjusted, after warming the brakes up a bit by starting and stopping a few times, using the directions
    view full answer...

  • Troubleshooting a Reliance Brake Controller That is not Operating Correctly
  • It sounds like the brake light switch wire coming out of the brake controller may be wired into the wrong circuit. If you have the older C/K body style with the square shaped front body, then you will need to double check that you have the red wire connected to the brake light switch wire. The wire on the brake switch that needs to be connected should be a light blue wire according to the installation instructions for the Reliance controller. You can use a tester, like # 40376, to
    view full answer...

  • Can Brake Controller Wiring Harness from a 2001 Chevy Tahoe Fit a 2006 Chevy Silverado
  • The wiring harness for the 2001 Chevy Tahoe, # 3025-S, is pinned out differently than the harness needed for the 2006 Chevy Tahoe. However, you can re-pin the 3025-S. With the blue locking tab on top, the white wire goes into the top left spot, the red goes in the bottom left spot. Black goes in center right and blue in bottom right. I have included a picture that should help.
    view full answer...

  • Do Wire Colors on Hayes Brake Controller Match Wiring Harness 20263 for 2000 Chevy Silverado
  • Yes, the colors on the harness # 3025-S and those on the brake controller, HA81745, will match up. White is ground, black is 12 volt power, red is input from the brake switch, and blue is output to the trailer brakes. To complete installation, there may be some additional connections you will need to make under the hood. I have included a link to an FAQ article explaining these under hood connections. But for a Hayes controller you will want to use the matching Hayes harness for the
    view full answer...

  • Brake Controller Wiring Adapter for a 1999 Chevy Suburban
  • I am sorry, but the Universal Brake Control Wiring Adapter 1999-02 Chevrolet, GMC, Cadillac, item # 3025-S, is only for the 2000-2002 Chevy Suburban with a New Body Style. It does not fit the 1999 Suburban. I just checked for you, and we do not have a custom brake controller adapter for the 1999 Suburban, which leads me to believe there is not a port available for the brake controller under your dash. Some models do have the brake (blue) and hot lead (orange or red) wires already ran
    view full answer...

  • Brake Controller Does Not Power On After Installation on a 2002 GMC Sierra
  • It does sound like you have everything hooked up properly and all of the connections under the hood are there so the only other things I can think of are a blown fuse (the green one) or a break in the wiring from that positive post on the fuse box to the brake controller. If the post does not have power as you have indicated then its connection to the battery must be broken. You can bypass it by connecting the power wire to the positive battery terminal via a 30 amp circuit breaker such
    view full answer...

  • What are the Wiring and Color Codes for a Bully Trailer Brake Controller
  • If you have a Bully TC-301 brake controller it should have the following wiring colors and codes: Black = ground Red = 12 volt power Blue = input from stop light switch Yellow = out to trailer brakes This is different than a connector like # 3025-S. On it the colors are black for 12 volt power, white for ground, blue for output to trailer brakes, and red for input to brake controller. But on a 1996 Chevy Suburban you will need to hardwire in the controller because there is no port
    view full answer...

  • Are the Under Hood Wires Connected for Brake Controller Installation on a 2002 GMC Sierra
  • If your 2002 GMC Sierra has the factory 7-Way tow package wiring installed on it then the under hood wiring is most likely connected to the studs that are found at the power distribution box. If your truck does not have the factory 7-Way tow package wiring, then you will need to connect the wires under the hood. We have a detailed article that shows where to connect the under hood wires, see link, and explains where to attach the brake controller output wire and 12 volt power lead for
    view full answer...

  • Installation of a Brake Controller for a 1999 Chevrolet 3500 Pickup Using the Fuse Box
  • Yes, even if you didn't have a factory installed 7-way you will want to hardwire the open wires of the brake control adapter to the wires on the brake controller and plug the other end of the adapter into the electrical junction box. We have a specific Help Article on how to do this and make all the proper connections for this to function properly for your 1999 Chevrolet 3500 that I've attached to this page for you to reference. The brake controllers that I really like and recommend
    view full answer...

  • Installation of Tekonsha Voyager in a 2001 Chevrolet Suburban 1500
  • It sounds to me as if you have a aftermarket 7-Way and 4-Way trailer connector installed on your vehicle. The Replacement Multi-Tow 7-Way and 4-Way Trailer Connectors for Ford, GM Trucks, item # 30955, should be attached to the factory connector under the vehicle near the spare tire see link. This connection should provide all of the wiring to your trailer connector from the front of the vehicle, except for the blue brake feed wire if the connector is not factory installed. The brake
    view full answer...

  • Brake Controller Wont Power Unless Brake Pedal is Pressed on 2000 GMC Sierra 1500
  • Since your 2001 GMC Sierra came with a factory installed 7-way trailer connector, GM should have already completed the connections under the hood at the fuse box. However, we have found that GM did not complete the wiring on all trucks, even if they came with the factory trailer wiring. If you plug in your brake controller using a plug-in style wiring harness, like part # 3025-S, and the brake controller does not power on then the wiring under the hood must be completed. I would also
    view full answer...

  • Wiring a Trailer Brake Controller With or Without Factory 7-Way on a 2000 Chevy Tahoe
  • Your 2000 Chevy Tahoe will have a port for brake controller wiring adapter, # 3025-S. You will want to look in the electrical junction box on the drivers side, left of the brake pedal under the dash. I have included an FAQ on installing a brake controller on Chevy and GM pickups that will also apply to your Tahoe. The first two pictures show the box you are looking for and where it and the connection point for the adapter is located. Some models have a factory 7-Way pre-wired through the
    view full answer...

  • Can Brake Controller Wiring Harness from 2001 Chevy Tahoe be Used in 2007 GMC Sierra Classic
  • The 2007 GMC Sierra Classic uses the same brake controller wiring harness as the 2006 GMC Sierra, # 3015-P for a Tekonsha brake controller. The 2001 Chevy Tahoe uses a different harness, # 3025-P or # 3025-S. What you can do if you do not want to buy a new harness is move the wire locations on the end of the connector you have at the end that plugs into the vehicle. It should be configured like the picture I have included for your 2007 GMC Sierra Classic.
    view full answer...

  • Parts Needed to Install Trailer Brake Controller on 1997 Chevy C/K Truck w/4-Way and 7-Way Adapter
  • For a 1997 Chevy C/K Series truck you will have to hardwire in a brake controller since that year did not come with the wiring or a port to plug in a controller. Since you already have a 4-Way and the adapter you will only need a few more things. You will need a brake controller installation kit like # 5506 (if it has 6 to 8 brakes). You will also need a 40 amp circuit breaker # PK54540 (for the 12 volt power to the 7-Way. If not needed you can tape up this wire and the circuit breaker
    view full answer...

Info for these parts were:

Expert Research:
Jackie C
Expert Research:
Michael H
Expert Research:
Jameson C
Edited by:
Lindsey S
Updated by:
Laura H
Written by:
Alexander C

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