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 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 vehicle'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

Video of Tuson DirecLink Base Model Trailer Brake Controller - 1 to 4 Axles - Proportional

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Tuson DirecLink Network Enhanced Trailer Brake Controller Review

Speaker 1: Today we're going to be taking a look at the Tuson DirecLink line of proportional brake controllers. Whenever we're towing a trailer or a camper like we have here, it's important that the brakes are going to be working properly. Whenever we slow down with our tow vehicle, we don't want to rely purely on that to slow our trailer down because we're adding so much extra weight. That's where our brake controller is going to come into play. Whenever we hit the brakes in a tow vehicle, our trailer brake controller is going to take that signal, and transfer it to our trailers, and have it apply the brakes.Now there are either going to be a couple different kinds of brake controllers. We're going to have a time delayed and a proportional brake controller.

Now, typically a time delay just has a preset timed amount that it pauses before it applies the brakes, and then it's going to ramp up to the maximum power. Now, our proportional brake controller is going to be a little bit different. It's going to take the deceleration of the vehicle and apply the brakes according to the trailer so they can work together.We're going to have three different models of our DirecLink brake controller. We're going to have the lite, the base model, and then finally the network enhanced model. Now, looking at them, they're all going to look the same and they're going to have a lot of the same features.

All of them are going to be a remote mount, so we're going to be able to mount the command module out of sight under the dash, and then the handheld control unit will be the only thing we'll see along with the cable.Now, each of them is going to come with a Delphi 4-pin connector, which is common on most brake controllers, and plenty of wire to get hooked up. You've going to have four wires. One for our brake signal coming from our brake pedal, a power wire, a ground wire, and then finally our brake output signal so we can get everything wired up. Now, the other cable coming out of the back of our brake controller is going to plugged directly into the OBD-II port on our tow vehicle. This is going to take all the readings from our vehicle so it knows how to apply the brakes accordingly.Now, there's not going to be any kind of sensors inside, so we're not limited to how we mount this like on some traditional proportional brake controllers.

It's not going to rely on that sensor inside to figure out how much we're slowing down since it's hooking directly into the vehicle's computer. No outside physical condition is going to affect how our trailer brakes because if we hit some bumps, go up or down a hill, or on some really rough terrain, if there was a sensor inside, that sensor is going to be getting jolted around. Well, this isn't going to rely on that, and we can mount this in any orientation that we want.Each unit is going to come with a control unit right here. It's going to be a handheld unit and have a nice, large display on it. Now, we do have the option of mounting it.

They're going to come with two mounting options, either a flat surface mount, or we're going to have a swivel mount here so we can mount it on the dash and have it in the easiest spot to reach and see at the same time. Again, like most brake controllers, it is going to have a manual override lever here. It's going to be spring loaded, so we can just reach over and push in if we need to take control of the brakes without putting the brakes on our tow vehicle.Each one of our controllers is going to work with trailers that have one to four axles or a total of eight brake assemblies. It's automatically going to configure to your tow vehicle as well as the trailer braking type, so it's going to work whether you have electric or electric over hydraulic brakes. Now, all of them are going to have a diagnostic feature to them. They're going to keep an eye on everything we want to make sure that we can monitor while we're towing. It's going to check the power and voltage at our brake switch, the output, as well as the connection at our OBD-II port to make sure that we have a good, solid connection there. It's also going to check the battery on our vehicle while we're driving.Now, if we step up from the lite to the base model, we're going to get a few more diagnostic features, but still have all the same ones from before. We're going to be able to monitor the transmission temperature, that way we can make sure that it's not overheating if we're going up and down a lot of hills, or if we're towing an extremely heavy trailer. Now, another big benefit of the base model over the lite version is that we're going to have low-speed brake adjustments. What that means is a lot times when we're going down the highway and we have our brake controller set, but as soon as we get off, our brakes are extremely aggressive and they're biting too hard. Now, we either need to deal with it or we need to readjust our brake controller.Well, this is going to take that out of there because we're going to be able to have our main adjustment for highway speeds, and then when we go below 30 miles an hour, we're going to have a low-speed brake adjustment, so we can tone it down if they're too aggressive, but if they're not aggressive enough, we can also bump it up a little bit as well. Now, one thing the base model has that the lite doesn't is that it is going to be compatible with HD trucks like Volvos or freight liners with an adapter that is sold separately.Now finally, if we get into the network enhanced brake controller, that one is going to have all the same features up to now, plus a lot more. Those are going to be specifically designed to work in conjunction with the actuator that goes with our DirecLink. They're going to be able to communicate directly and let us know a lot of different things that are going on. We're going to be able to check brake fluid level. If it gets low, it's going to give us a warning sign. It's also going to let us know the integrity of the connection at the brake controller and the trailer, and it's going to give us all the electrical diagnostic that we need, whether the voltage is low or the amperage is low, and it's also going to be able to tell us the temperature of our brake fluid level to let us know if we're going to need to slow down and take it a little bit easier on our brakes.Now, the network enhanced brake controller is going to work in conjunction and speak directly to the ABS module that is available separately as well. It's going to read all the sensors, let us know what's going on if there's a problem, as well as being able to read the pressure at the brake actuator, and any kind of temperatures, and let us know exactly what's going on with the ABS. If you're looking for a brake controller that's going to have that truly proportional braking, the lite is going to be a great option.Now, if you want a little bit more and you want to be able to read a little bit more of what's going on with your vehicle as well has having the HD compatibility, the base model is going to be a great one. Now, if you want to go all out and have ABS on your trailer, and have hydraulic actuator, and upgrade everything, the network enhanced one is going to be the best option because it's going to give us every available feature that we could ever want. That'll finish up your look at the Tuson DirecLink line of proportional brake controllers.

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   (5 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: 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 Brake Controller
Do you have a question about this 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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 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...

  • 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 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...

  • Do Wires On Brake Control Wiring # 3025-S Match Up Color To Color on a 2002 Chevrolet Avalanche
  • To connect the Universal Brake Control Wiring Adapter, part # 3025-S, you would plug one end to the brake control port underneath the dash that should be located to the left of the steering column. The wire colors for this adapter will match up color for color to the wires coming out from the brake controller. The wire functions traditionally on a brake controller are as follows: Red Wire - Stop Light Switch Blue Wire - Trailer Feed, Power To Brakes Black wire - 12 volt power White
    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...

  • 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...

  • 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...

  • 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...

  • Why Does Manual Override Lever of Brake Controller Illuminate Trailer Brake Lights
  • Everything is most likely working just fine. Most modern brake controllers will put voltage on the brake signal circuit they are attached to when the override lever is applied so that your trailer brake lights would come on as you are applying braking power to the towing setup.
    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...

  • Brake Controller Installation Details and Running Wires on a 2002 GMC 2500 Pickup
  • The best practice for running wires through the firewall on your 2002 GMC 2500 HD pickup, is to find an existing opening that has a grommet and use that. You'll also want to make sure that you keep the wiring well away from any moving or hot parts. In the absence of an existing opening, you might have to drill to make your own. In that case, make sure you are aware of what is behind the spot where you plan to drill, so you don't drill through anything important. You will need to use
    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...

  • 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...

  • How to Wire a Bully Brake Controller to a 2003 Ford F-250 Using a Hopkins Wiring Harness
  • As you have found out manufacturers make their own compatible plugs to match their own brake controllers. It looks like the Bully controller comes with a universal harness with blunt cut wires. You will need to cut the end off the Hopkins harness that plugs into the controller and wire it up as follows: Bully connector black to Hopkins harness white for ground Bully red to Hopkins black for 12 volt power in Bully blue to Hopkins red for stop light switch Bully yellow to Hopkins blue
    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...

Info for these parts were:

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

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