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Activator IV Electronic Brake Controller

Tekonsha (Part Number:8507120)

Your Price: $115.99
List Price: $213.95
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Tekonsha's Activator IV electronic trailer brake control combines all the great features found on Activator I & II, III plus it features a Plug-N-Play port to accept Tow Ready custom fit wiring harnesses, making installation on most full-size pickups, vans and SUV's a snap.

Activator IV is compact and contains no moving parts or pendulums so it can be mounted virtually anywhere and in any position. Also equipped with on-board diagnostics for overload, open ground.

  • Not recommended for use with BMW X5 Sport Utility Vehicles.


Fits2, 4, 6, 8 Brake Trailers
Installation InstructionsCLICK HERE


  • Output - For ease of adjustment, the output control is located on the front of Activator IV. It has a up-front push button adjustment and its output indicator is a digital display that shows the output when the brakes are applied.
  • Sync - The sync control has push button adjustment located on the front of the controller to syncronize the braking between the tow vehicle and trailer. The sync setting is shown on the Activator IV's digital display.
  • Manual - The manual control is activated by squeezing the trigger located on the front of Activator IV. When applied, it will illuminate both the tow vehicle and trailer's stop lights as required by National Highway Traffic Safety Administration regulations.
  • Installation - Activator IV has no moving parts or pendulums to adjust, so it can be mounted in virtually any position. Activator IV also includes a Plug-N-Play port to accept Tow Ready brake control harnesses. Click Here to find a custom fit brake control harness for your vehicle.


  • Mounting Bracket and Hardware

Not Included:

  • Wiring Adapter


Tekonsha Engineering opened its doors in 1963 and at that time manufactured wooden steps for the Mobile Home Industry. In the mid 1960's they started manufacturing hydraulic brake controls (2014 & 2015). When the 70's came Tekonsha Engineering made a major break through, they were the first to break new ground with an electronic brake control (the sway control and the 2040). These units changed the company forever. They went on to manufacture the 2016 & 2017, which are hydraulic controls, and the 2030 & 2035, electronic controls.

In the early 90's Tekonsha introduced the Commander™ and Voyager™ proportional electric brake controls. In 1993 they followed with the AccuTrac®, an inertia sensitive control and in 1995 the Sentinel™ was introduced as a monitoring unit.

March of 1999 was exciting for Tekonsha™ with the launch of a new proportional control, the Envoy™. This unit has the best features of the Voyager™ and the Sentinel™ combined in one unit. Tekonsha's newest self-leveling proportional control, the Prodigy™, made an exhilarating release into the industry in February of 2001. It is the latest and most intelligent brake control from Tekonsha™. This powerful control features new motion sensor technology similar to what is used in the aerospace industry.

In January of 2003, Cequent purchased Tekonsha Engineering.

The above information has been provided by the Manufacturer, and we cannot guarantee the accuracy thereof or endorse the opinions expressed.

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